The Auditorily and Speech Handicapped

摘要: DURING the past decade, research in hearing and speech impairments has attained prodigious proportions. A good ideal of impetus for this was provided by armed forces development Army Navy rehabilitation programs casualties. The funds utilized key institutions personnel developing instrumentation, materials, procedures successful prosecution their programs. Even after conclusion war, not only manifested continued interest such service, but also made available to individuals bulk which formerly fell into restricted categories. Concomitantly, educational service agencies thruout country expanded facilities exceptional children adults (2, 4). Because extremely large number contributions appearing since last review Johnson Gardner (69), selection could include a limited these references. Some cover wide areas themselves. Davis (25), Licklider (81, 82), Miller (95, 96), von Bekesy (141), Wever (149) penetrated frontiers psycho-acoustics, psychophysiology, other audition phenomena amazingly profound depths. Jacobson (66) reported informational capacity human ear depended little on its dynamic range. He further considered methods match ear, calculated average 0.3 bit/sec. an individual cochlear fiber. (24) proposed that Gabor Information Diagram approximated characteristics better than wave-form or frequency-spectrum representation. others (97) compiled two-volume bibliography covering approximately 5500 Bangs (7), Curry (22), Elliott (37), Leutenegger (79) accumulated bibliographies laryngectomy, adolescent voice changes males, stuttering, aphasia, respectively. Weissberg (146) collected classified extensive audio-visual materials disorders. trend deal with as mutually inclusive entities is represented redesignation American Speech Correction Association Hearing 1948, greater existing clinics centers 1953 (2).