The Human Voice: An Instrument in Residence, Part 1 ~

The human voice: an instrument in residence

Instrument

Singers are fortunate to have a traveling instrument requiring no special assembly or installation. Even so, it is helpful to understand the make-up of the singing apparatus.

The Human Larynx

The larynx is the main structure of the human singing instrument. It is an organ suspended in the neck from the hyoid (the only bone in the larynx), and it is situated below the jaw in the neck. Its composition is primarily cartilage (seven cartilages total), tissue, membrane, and muscle.

Location of Larynx

Because the main part of the larynx is in a state of suspension, it can make excursions up and down and side to side in the neck. For singing and speaking, the laryngeal structure tilts and vibrates.  

An interesting feature of the larynx is the epiglottis, which is a leaf-shaped flap of cartilage located behind the tongue at the top of the larynx. Its function is to seal the windpipe during swallowing so that food or saliva is not accidentally inhaled. Thus, the larynx is instrumental in the prevention of choking.

Parts of Larynx

Phonation

Phonation is the sound of singing and speech which occurs from the oscillation of the vocal folds and resonance of the vocal tract. Singing and speaking require a combination of changes in position, tension and mass of the vocal folds.

Vocal Folds

Vocal folds are composed of mucous membrane stretched horizontally across the top opening of the larynx. The folds are situated just below the pharyngeal tract and above where the tract splits into the trachea and the esophagus within the larynx. They are open for breathing and closed for swallowing, sealing the windpipe from food and liquid.

Superior View of Folds

Vocal folds are essential for phonation or vocalization. Phonation requires the vibrate, modulating the flow of air being expelled from the lungs during phonation.

The size of the folds affects voice pitch. Vocal folds begin growing to their full adult length and thickness during adolescence.

  • Adult male vocal folds are relatively large and thick. Male vocal folds are between 0.75″ to 1.0″ in length.
  • Female vocal folds are less dense and are between 0.5″ to 0.75″ in length.

TO DO:

 I. Body Mapping the Larynx:

  • Gently place the fingers of one hand on one side of your neck/throat and then swallow. A swallow is a complex procedure involving numerous pairs of muscles. You probably noticed the larynx moving up then back down to a neutral position under your fingers as your tongue pushed saliva to the back of your mouth and down the throat.
  • Gently place the fingers of your hand on one side of your throat and yawn. As the jaw descends and the tongue lowers for the yawn, you will notice the larynx move down.
  • Gently place the fingers of your hand on one side of your throat and carefully nudge the larynx to one side. Repeat with the opposite side. Notice that the larynx can move slightly side to side.

II. Body Mapping the Vocal Folds:

  • Gently place the fingers of your hand on one side of your throat while you hum. Notice the feeling of vibrations in your neck. Try touching around your lips, nose, jaw, skull and chest while you hum or sing throughout your vocal range. Notice the vibrations that are produced when you phonate.

 

Open & Close & Shortened

  • Simulate the opening and closing of your vocal folds: Beginning with your palms together as in figure ‘a,’ move your hands apart while inhaling (figure ‘b’). Now, sing a long tone as you bring your palms together. Each time you breathe, repeat the sequence, opening the palms for breath and closing for singing. Notice that the breath exhalation begins slightly before tone starts.
  • Again, beginning palms together, breathe, opening your palms as in figure ‘b.’ Bringing palms together, sing an ee [i] vowel, starting from your lowest comfortable note. Perform a glissando to your highest comfortable note. As your voice slides from low to high, move your thumbs from a forward position (figure c) to an upright position. Move the thumbs back to the starting position as you slide your low voice down to your lowest comfortable note. The thumb movement simulates the lengthening and shortening action of the folds as you sing from low to high. Be sure to open your palms each time you take a breath and close your palms as you sing.

III. Body Mapping Tension/Relaxation:

  • Gently place the fingers of your hand on one side of your throat. Open your mouth as wide as possible. Notice the tension around your mouth, neck and jaw. Now, relax the opening until it feels natural and comfortable. Practice singing a range of vowel sounds with the jaw comfortably open.
  • Gently place the fingers of your hand on one side of your throat. Make an expression of a dramatic frown and a dramatic grin. Notice the tension around your mouth, neck and jaw. Try rolling your shoulders to an extreme back position. Notice the tension around your neck. Relax to a neutral position. Experiment with a range of postures and expressions noticing any tension and exploring to find relaxation.
  • Consider how tense postures might inhibit the ability of the larynx to move, tilt and vibrate while singing.

References

Birch-Iensen, M., Borgström, P. S., & Ekberg, O. (1988). Cineradiography in closed and open pharyngeal swallow. Acta radiologica29(4), 407-410.

Lumb, A. B. (2016). Nunn’s applied respiratory physiology eBook. Elsevier Health Sciences.

Mittal, R. (2011, April). Motor function of the pharynx, esophagus, and its sphincters. In Colloquium Series on Integrated

Systems Physiology: From Molecule to Function (Vol. 3, No. 3, pp. 1-84). Morgan & Claypool Life Sciences.

Trollinger, V. (2005). Performing arts medicine and music education: What do we really need to know?. Music Educators Journal92(2), 42-48.

Vocal folds. (2018). ScienceDaily. Retrieved 31 December 2018, from www.sciencedaily.com/terms/vocal_folds.htm

Zveglic, E. A. (2014). Speech and singing. In Recognizing and Treating Breathing Disorders (Second Edition) (pp. 203-214).

Interview with Emily Crocker, Renowned Composer and Choral Consultant

Emily Holt Crocker has recently been appointed Founder and Music Director Emeritus of the Milwaukee Children’s Choir, an organization she established in 1994, by the Board of Directors of Milwaukee Children’s Choir. The choir has received acclaim for performances with the Milwaukee Symphony Orchestra, Milwaukee Chamber Orchestra, Milwaukee Ballet, Milwaukee Chamber Orchestra, Milwaukee Youth Symphony Orchestra, American Choral Directors Association and international choir festivals in Japan and England.

As a composer, Ms. Crocker’s works have been performed around the world. She has received ASCAP awards for concert music since 1986. She is well known for her work in developing choral instructional materials and is author of Experiencing Choral Music, choral textbook series for grades 6-12, published by McGraw-Hill/Glencoe. As a conductor, she has led the Midwinter Children’s Choral Festival in Carnegie Hall and conducted the Milwaukee Pops Orchestra and Milwaukee Chamber Orchestra. In 2002, she was a recipient of the Excellence in Youth Music Award from the Civic Music Association of Milwaukee. 

Here is a brief interview with our notorious contributor to developing young voices around the world ~

DV: First, can you tell us a little bit about yourself? Where were you born? Where did you attend school and study music?

EC: I was born in Fort Worth, Texas and received my primary and secondary education in Fort Worth Public Schools attending Meadowbrook Elementary, Meadowbrook Junior High, and Eastern Hills High School. I did spend 18 months during grades 6-8 in Altus and Weatherford, Oklahoma.

I went on to get a Bachelor of Music Education from University of North Texas and a Master of Arts in Music Theory from Texas Woman’s University. From there, I continued my post graduate studies in Choral Conducting, Choral Literature, Rehearsal Techniques and German from University of North Texas. From 1980-85 I studied Linguistics, and English and American Literature as a secondary teaching field.

DV: What is your first musical memory? 

EC: Hearing Hank Williams singing Hey! Good Lookin’ – What ya got cookin’ on the radio, and then the great singing at my home church, Church of Christ. There was a lot of a cappella singing. I heard 4 part harmony from my earliest years and began to follow the hymn notation from about age 5 or 6

DV: Did anyone in your family sing or play an instrument? Would you say your family was musically inclined?

EC: We were avid players of the radio and record player! My mother sang old songs around the house. My father had played the guitar as a teen.

DV: Did you study an instrument privately when you were young? If so, what and with whom?  

EC: Like every young girl in the 50s, I started piano at age 7 and I was lucky to have a treasure of a teacher, Laura Helen Coupland, who took me through to my high school graduation. Not only did she teach me piano repertoire and technique, she made sure I had a good understanding of music theory, ear training and music history.

DV: Were there any opportunities that came your way that inspired you to take the path of devoting your life to music?

EC: By high school, I was fairly certain that I was going to go into music. I had a number of experiences that were formative. I was selected as the high school drum major, and although I was a small person to be a drum major, I learned a great deal about leadership. In college, I also had the opportunity to tour Asia with an all-girl USO band, which opened my eyes to the wider world and helped me form bonds with other women musicians like myself. I received my music degree from University of North Texas which was a very large music school. This helped me establish myself among my peers and begin charting a career pathway in music.

DV: What were the greatest lessons you learned from your teachers (life lessons or musical) and who were they?

EC: I have had great mentors and teachers throughout my life, even now! I have learned the value of optimism, of humor and of persistence. Any challenge in life can be looked at as a series of steps or actions. Also, you have to advocate for yourself – see yourself where you want to go. That is the first step to getting there!

DV: You have balanced life as a composer, music educator, choral conductor and publicist. Tell us why and how you continued to simultaneously balance all these pursuits.

EC: My position with Hal Leonard Publishing made all the rest possible! I started writing music while still an educator and did that for about 10 years before officially joining the company and moving to Wisconsin. Composing and conducting were more personal goals of mine, and with lots of energy, I was able to combine all these with varying degrees of success. Also, I had lots of help from associates, friends and family and support from my bosses.

DV: In 1994 you formed the Milwaukee Children’s Choir. The Milwaukee Children’s Choir is celebrating its 25th season this year. What inspired you to create this organization? Are there others you would like to recognize that were on “the team”?

EC: Milwaukee had children’s choirs in the past, but for some reason, had not become a part of the children’s choir movement of the 1980s and 90s. One of my bosses at Hal Leonard, Steve Rauch, helped me to organize a group in 1994 based on Henry Leck’s Indianapolis Children’s Choir model. Henry was enormously helpful as well, sharing governance documents and organizational strategies, and although there were differences in our situations, I consider Henry’s initial guidance as crucial. I also was inspired by the writings of Doreen Rao and Jean Ashworth Bartle on children’s choir repertoire and techniques.

I had wonderful collaborating colleagues: Charyl Granatella, Assistant Conductor from the very beginning, Donna Mitchell, our first Accompanist, Ellen Shuler, Assistant Conductor, Sharon Stosur, Accompanist, Amanda Draheim, Accompanist, Maria Koester, Accompanist, Sandy Cristan, Choir Manager, Casey Murphy, Choir Manager, Rob Sholl, member of the Board of Directors, along with Sharon Hansen. 

Other conductors remembered with great fondness: Christopher Peterson, Tina Glander Peterson, Raymond Roberts, Roxanne Miles, Linda Rann – there were tons of choir assistants, other board members & volunteers as well.

DV: What are your greatest memories of Milwaukee Children’s Choir?

EC: We sang wonderful music in beautiful spaces, but my favorite memories are the day to day moments and rehearsal successes, where the music came together and friendships were made and laughter shared.

DV: Did you ever have thoughts about how it would evolve and how it might look today?

EC: Milwaukee Children’s Choir has achieved many of the goals we established in the first 15 years of our existence: high artistic quality, comprehensive graded choirs, recognition as a full-fledged arts organization, school and other outreach programs, and collaboration with other Milwaukee and regional groups. I think that everyone would like to see a enrollment increase and a provision for further opportunities of children with limited means.

DV: You have been an advocate for children’s voices. You have experienced great success as a composer that understands the voice of the child and how to develop it. Can you tell us how the creative process begins for you and what that process is from conception to finished product?

EC: For me, it all starts with song and play. My first years teaching classroom music based on Kodaly principles gave me the opportunity to enjoy making music with children and seeing how song brings learning to life. My first successful arrangements were based on folk songs and the simple techniques employed in Kodaly teaching: ostinato, canon, countermelody. So, as a composer/arranger, I start with the song and develop it outward from that point. I also try to write a piano accompaniment that supports and contributes as an independent voice. My original music comes much the same way, but from a carefully chosen text and a melody that flows naturally from that text.

DV: You served as Choral Editor for Hal Leonard Publishing for more than two decades. Can you tell us a little bit about the work of a choral editor and just what an editor might be looking for – something that can help rising composers understand the criteria for getting published or writing appropriate works for choir?

EC: When I went to Hal Leonard, it was primarily a publisher of pop arrangements, and of course still is. We expanded the types of pop arrangements, leveled from easy to difficult, Broadway, jazz and show. My contributions were of expanding concert music for school groups and upward to the collegiate and professional level. We accomplished this by establishing relationships with important conductors and composers who introduced us to new compositional voices. Some of these include: Moses Hogan, Henry Leck, Rollo Dilworth, Andrea Ramsey, Audrey Snyder, Craig Hella Johnson and more. We also maintained our longterm writers such as Roger Emerson.

My advice for a new writer, would be to carefully examine works published by composers or companies that you admire, analyzing the overall qualities of those works. Then work to develop your own unique, authentic voice, performing your works with your own choirs and asking for input from your friends and colleagues.

As to getting published, try to make a contact with a publisher’s representative. There are also options for self-publishing now that didn’t exist when I started.

DV: What advice would you give to new composers pursuing a career writing for voices and especially children’s voices?

EC: The best way to learn to write for children is to work with children – so find (or start) a children’s choir and see what causes them to light up when they sing.

DV: Can you tell us a little bit about what inspires Emily Crocker?

EC: I enjoy and am inspired by the process. So when I’ve finished a piece or project I’m a little bit at loose ends until I find the next one. I have dozens of ideas on scraps of paper tucked away in a folder, so I have plenty of potential projects!

I am also inspired by the new generation of conductors, composers & educators. Our art is in good hands!

DV: What projects, personal and musical, are next for you?

I’m just finishing up my composing portfolio for the year, just one or two pieces still in progress. I’ll be shifting to a couple of instructional/curriculum projects for the spring. I have a couple of sessions this spring at Illinois MEA (also the elementary girls honor choir) and national ACDA.

DV: In May of 2019, the Milwaukee Children’s Choir will be premiering a commissioned work written by Emily Crocker to celebrate its 25th season and honor its Founding Music Director. 

We wish Ms. Crocker continued success with all of her many endeavors. We hope we are able to enjoy her talents and contributions to the world of choral music for a long time to come.

Lynn Swanson

GESTURES or WORDS?

Please see two videos attached.

Knowing that language is a true barrier in working with our Chinese choirs, I have been forced to be more concise with my instruction! I hope I make this change permanent. The shortest explanation to our singers can either create more confusion or fall silent on their young minds. Even though I have a translator, I must wait for the translator to deliver the instruction then hope the translation was accurate.

Dr. Daugherty, Ph.D. at the University of Kansas, constantly stressed delivering remarks in seven words or less. This might be a hard fast rule for advanced or professional choirs, but it is certainly an efficient manner in which to manage rehearsals for younger choirs.

For the novice singer to the most mature singer, the use of gestures and modeling has become my modus operandi. At this stage, few of our singers actually need more explanation. They simply need to hear and see how the phrase is sung.

In the two videos attached, the Purcell Choir, 9-11 year olds, is singing Sanctus from Cornell’s Unison Mass. We added a breath mark after the highest note in the last phrase of the piece. The natural response is to clip the note while also accenting it. The only remedy was to demonstrate using the fingers of one hand to gently brush the palm of the other. Viola! The voice automatically matched the kinesthetic gestures used by the hands.

The Byrd Choir, 7-8 year olds, has been using Brahms’ Die Nachtigall to learn many elements of musicianship. It has served us well learning to:

  • count sing “1-2-3” in English
  • sing repeating pitches, rhythms and arpeggios
  • sing staccato
  • sing German text

We used the fingers of one hand to tap lightly the other in order to understand staccato singing and to understand where to put the final consonant. In this case the end of each phrase ended with a crotchet or quarter note. All the other notes in the piece are quavers and semi-quavers.

So much more can be accomplished in less time, when we apply a gesture to better understand the goal of our music making. Articulation and phrasing become instantly clear and without ever giving any verbal instruction. Accept the challenge to see how few words you can use in order to achieve amazing results.

Lynn Swanson, MME

December Survival Guide for Singers

“It’s the most wonderful time of the year….” You just sang that in your head, didn’t you?!? Congratulations! It’s December! The magical, marvelous season of wonder is upon us. We wonder what we were thinking when scheduled our month with back to back to back rehearsals and performances that fill our lives and calendars. Of the many challenges facing singers, staying healthy is probably the most important of all. Many of the tips you are about to read, are things you already know. However, a few reminders may keep you in good voice for all your endeavors.

  1. Hydrate, hydrate, hydrate! I think I may have posted about this before! 😊
    • Drink more water! Breathe steam! Depending on humidity levels where you live, you may need to outfit your home with humidifiers. If you are in a drier climate, you should probably be running yours at about a 50% level.
    • Keep an assortment of your favorite herbal teas at hand if you find water monotonous. If you prefer a sweet treat, consider adding honey. It can soothe a tender throat and has natural antibiotic properties.
    • If you are sensitive to dairy products, save the egg nog for after your gigs. In some individuals, some dairy products may cause mucus to thicken. Thick mucus impedes the free oscillation of the vocal folds making it necessary to exert greater breath pressure to create sound and/or more breath pressure to blow the thicker mucus off the vocal folds.
  2. REST! Rest your voice, rest your body, rest your mind. Remember that even if you are NOT actively phonating, your larynx may be moving as though actually singing just listening to your music. Remember, speaking and singing use the same muscles and coordination. REST = QUIET!
  3. Eat well! As time is a precious commodity, grabbing a quick bite can be tempting! Acid reflux is a common affliction for singers. A healthy diet will reduce the possibility or symptoms. Spicy foods, while delicious, can irritate the pharynx and cause additional sensitivity or swelling. Enjoy with care!
  4. Practice Smart! Not every rehearsal requires 100% of your effort 100% of the time. Sing smart & save your best for performance. Some may take issue with this and say you should always give it your all. If you have the luxury of abundant rest, by all means, sing with all the joy and passion you have within you! But, if your calendar has few to no days of rest, budget your resources wisely.
  5. Cool down vocally after a concert or rehearsal. During especially busy weeks, warm salt water gargles can aid recovery by whisking away extra swelling and soothing tender pharynx tissues. I realize the salt water never actually contacts the vocal folds, but swelling can be reduced in near tissues and the extra water in the vocal tissues will be pulled out indirectly.
  6. Have a well packed gig bag!

GIG BAG should include: 2 full water bottles tea, snacks, fuzzy socks, scarf, throat drops (NO MENTHOL, EVER! More on that later…), tissue, hand sanitizer, saline spray, lip balm, acetaminophen (not ibuprofen or other NSAIDS they can contribute to vocal fold bruising – more on this later too!), pencil, post-it notes, thank you notes, business cards, pitch pipe, and if soloing – an extra copy of your music. Be prepared to share! 😊

I don’t know what December is without every weekend jam packed with music. With care and preparation, I hope to never face that sadness. Sing with joy and sing well!        –

Contributed by Author Melissa Shallberg

 

 

The Human Brain and the Influence of Music

Are you looking for a great book to add to your holiday reading list?
By Developing Voices Author Jamea J. Sale, MME

Are you looking for a great book to add to your holiday reading list? I suggest Musicophilia (2007) by Oliver Sacks. Musicophilia explores the wonders of the brain, neuroscience and music. In any other hands the topic could make for dry reading, yet Sacks exudes enthusiasm about advances in neuroscience which enabled the visualization of the human brain under the influence of music. Sacks also adhered to his point of view that the description and observation of the people being studied is paramount. Perhaps this explains why Sacks’ writing is so appealing and accessible to readers; he weaves the clinical aspects of musicophilia into an artful telling of each patient’s life experience.
What is musicophilia? The Greek word suffix -philia as applied to music refers to an abnormal or heightened awareness of music which presents as intense music-seeking or music-associated behaviors in people. This might include the playing of music, dancing, or singing along to tunes (Fletcher, Downey, Witoonpanich, & Warren, 2013). An example is the account of Tony Cicoria, a surgeon who had a near death experience when he was struck by lightning in a telephone booth. He made a full recovery and returned to his work as a surgeon, but his life was transformed by an extraordinary craving to play the piano thereafter.
Sacks refers to such phenomena as musical “hauntings.” Less dramatic hauntings occur for the average person. Many have experienced the occasional “ear-worm” in which a song is “stuck” in one’s mind. The music subverts a part of the brain somewhat like a tic. Unfortunately for some people, this repetitive firing of the brain becomes a musicophilia, and it takes on a disturbing pathological quality taking place at a high level in the brain.

Sacks made profound discoveries about music and the brain in his lifetime. Movie enthusiasts may be acquainted with the dramatic film called Awakenings, based on his 1973 book of the same name which recounted the experience of catatonic patients suffering the after-effects of sleeping sickness. These patients miraculously “awakened” after being treated with the drug, levodopa, but sadly the effects of the drug were short-lived. However, Sacks found that his patients responded to music! They were observed to temporarily move with ease and grace in response to music, and they could sing expressively. Music represented auditory dopamine for these patients, a testament to the therapy of music in their lives.
https://youtu.be/JAz-prw_W2A (Awakenings trailer)
Musically talented people are often described as having a marked, innate musical ability, and a good ear for pitch and rhythm (Watts, Murphy, & Barnes-Burroughs, 2003). In Musicophilia, Sacks suggested that there is innate musical talent in everyone but that the cognitive and emotional capabilities needed to grasp music varies from person to person. He explored the ability of people to realize the artistry, meaning, and phrasing of music, and the apparent neurological misalignment that inhibits some people from achieving their desire for great musical ability. The advent of MRI morphometry in the 1990s made it possible to visualize the brain structures of musicians. It was determined that in the brains of professional musicians, the corpus callosum is enlarged and that the planum temporale, a part of the auditory cortex, is asymmetrically enlarged in those having absolute pitch (Gaser & Schlaug, 2003; Hutchinson, Lee, Gaab, & Schlaug, 2003). There are “increased volumes of gray matter in the motor, auditory, and visuospatial areas of the cortex and in the cerebellum” of this population (Sacks, 2007, p. 100).

Figure 4: Gaser, C., & Schlaug, G., 2003, pp. 9243.
For a very few, amusia is a reality. Acquired amusia can occur as part of a neurological event (stroke, migraine, etc.) that may affect one’s perception of music. Researcher Steven Mithen, author of The Singing Neanderthal (2005), was convinced that musical language is embedded in the human genome, even more so than spoken language, yet Mithen said that he, himself was unable to match pitch or rhythm. Therefore, Mithen was compelled to discover whether his claim to life-long amusia could be overcome. His adventure involved taking singing lessons and having brain examinations under fMRI. Mithen’s singing practice not only led to heightened activity in his brain’s inferior frontal gyrus and superior temporal gyrus but Mithen also had substantial improvement in his ability to sing! After the year-long experiment, Mithen wrote that it is “remarkably difficult to sing—to simultaneously and unconsciously manage pitch, rhythm, timbre, tone, and dynamics—I am even more mystified as to why humans have evolved such an amazing ability.” (Mithen, 2008, p. 39).
Musicophilia concludes with a reminder that all cultures hold music in high esteem. It is central to human dance, religion, celebration and entertainment. One need not be particularly knowledgeable about music to be profoundly affected by it. The same could be said about the artfully woven personal stories and scientific studies of humans and music in Musicophilia. It is a compelling and worthwhile addition to your holiday reading list!

Jamea Sale, Director of the Institute for Healthy Singing:                                JSale@HealthySinging.org                                                                                                              Executive Associate Director, William Baker Choral Foundation
Voice Specialist, Allegro Choirs of Kansas City
References
Fletcher, P. D., Downey, L., Witoonpanich, P., & Warren, J. (2013). The brain basis of musicophilia: evidence from frontotemporal lobar degeneration. Frontiers in Psychology, 4, 347.
Gaser, C., & Schlaug, G. (2003). Brain structures differ between musicians and non-musicians. Journal of Neuroscience, 23(27), 9240-9245.
Hutchinson, S., Lee, L. H. L., Gaab, N., & Schlaug, G. (2003). Cerebellar volume of musicians. Cerebral cortex, 13(9), 943-949.
Koelsch, S., Skouras, S., Fritz, T., Herrera, P., Bonhage, C., Küssner, M. B., & Jacobs, A. M. (2013). The roles of superficial amygdala and auditory cortex in music-evoked fear and joy. Neuroimage, 81, 49-60.
Llinás, Rodolfo (2001). I of the Vortex: From Neurons to Self. Cambridge, Massachusetts: MIT Press.
Mithen, S. (2008). Singing in the brain. New Scientist, 197(2644), 38-39.
Robb, S., Hanson-Abromeit, D, May, L., Hernandez-Ruiz, E., Allison, M., Beloat, A., Daugherty, S., Kurtz, R., Ott, A.,
Oyedele, O., Polasik, S., Rager, A., Rifkin, J., & Wolf, E. (2018). Reporting quality of music intervention research in healthcare: A systematic review. Complementary therapies in medicine.
Sacks, O. (2007). Musicophilia: Tales of Music and the Brain. New York: Vintage Books.
Storr, A. (1992) Music and the Mind. New York: The Free Press.
Tomaino, C. M. (2015). Music therapy and the brain. Music therapy handbook, 40-50.
Watts, C., Murphy, J., & Barnes-Burroughs, K. (2003). Pitch matching accuracy of trained
singers, untrained subjects with talented singing voices, and untrained subjects with nontalented singing voices in conditions of varying feedback. Journal of Voice, 17(2), 185-194.