Hypophonia is soft

speech Speech is a human vocal communication using language. Each language uses Phonetics, phonetic combinations of vowel and consonant sounds that form the sound of its words (that is, all English words sound different from all French words, even if ...

, especially resulting from a lack of coordination in the vocal

musculature Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle ...

. This condition is a common presentation in

Parkinson's disease Parkinson's disease (PD), or simply Parkinson's, is a long-term degenerative disorder of the central nervous system that mainly affects the motor system. The symptoms usually emerge slowly, and as the disease worsens, non-motor symptoms becom ...

. This condition is generally treated with voice training programs, use of shorter sentences, breathing exercises, and muscle training exercises for

vocal cords In humans, vocal cords, also known as vocal folds or voice reeds, are folds of throat tissues that are key in creating sounds through vocalization. The size of vocal cords affects the pitch of voice. Open when breathing and vibrating for speech ...

Further research

Doctors at the

Indiana University of Pennsylvania Indiana University of Pennsylvania (IUP) is a public research university in Indiana County, Pennsylvania. As of fall 2021, the university enrolled 7,044 undergraduates and 1,865 postgraduates, for a total enrollment of 9,009 students. The univ ...

have proposed a novel treatment for hypophonic voice: Twang therapy.

References

Symptoms and signs: Speech and voice Parkinson's disease {{med-sign-stub