Phonagnosia or Unfamiliar Voices

Vocally Voice Activated Phone Dialer

Amazon Price: $199.95 (as of 06/04/2012)

Musically tone-deaf individuals have difficulty discriminating intonation contours extracted from speech [An article from: Brain and Cognition]

by: A.D. Patel, J.M. Foxton, T.D. Griffiths

Amazon Price: $5.95 (as of 06/04/2012)

Musically tone-deaf individuals have psychophysical deficits in detecting pitch changes, yet their discrimination of intonation contours in speech appears to be normal. One hypothesis for this dissociation is that intonation contours use coarse pitch contrasts which exceed the pitch-change detection thresholds of tone-deaf individuals (Peretz & Hyde, 2003). We test this idea by presenting intonation contours for discrimination, both in the context of the original sentences in which they occur and in a ''pure'' form dissociated from any phonetic context. The pure form consists of gliding-pitch analogs of the original intonation contours which exactly follow their pattern of pitch and timing. If the spared intonation perception of tone-deaf individuals is due to the coarse pitch contrasts of intonation, then such individuals should discriminate the original sentences and the gliding-pitch analogs equally well. In contrast, we find that discrimination of the gliding-pitch analogs is severely degraded. Thus it appears that the dissociation between spoken and musical pitch perception in tone-deaf individuals is due to a deficit at a higher level than simple pitch-change detection.

When the Brain Can't Hear

by: Teri James Bellis

Amazon Price: (as of 06/04/2012)

Auditory Processing Disorder (APD) occurs when the brain cannot process or understand correctly the sounds the ears hear, even though the ears might be functioning properly. It is rarely recognized, often misdiagnosed, and poorly understood, yet the effects can be devastating. Pocket is simultaneously releasing two complementary texts on the subject that are definitely worth some notice. Foli's Like Sound Through Water is a mother's account of her family's struggle with APD in her oldest son, Ben. Her account reads like a novel and is thoroughly engaging while providing a wealth of information. Foli clearly shows the pain misdiagnosis and clinical inaccuracies can cause. While finally obtaining a correct diagnosis brought some relief, Foli shows that the battle for normalcy had only begun. This is mostly a success story with an upbeat ending. The resource section in the back is a bonus. Bellis's When the Brain Can't Hear is the first APD sourcebook written specifically for lay readers. Bellis, the author of an important text on APD for professionals (Assessment and Management of Central Auditory Processing Disorders in the Educational Setting from Science to Practice), herself suffers from APD as the result of a car accident. Her text is naturally more clinical in nature but still quite readable. It covers the many subtypes of APD and their manifestations, diagnosis and testing, treatment options, and coping techniques.