... rights reserved The contents, or parts thereof, may be reproduced with Introduction to Audiology Today, First Edition, by James W Hall, provided such reproductions bear copyright notice, but may not ... Define dB HL 10 TEST BANK ANSWER KEY Chapter 1 Hearing loss and related disorders Raymond Carhart One half (50%) Six Otology/Otolaryngology 1920s Northwestern Psychoacoustic Laboratories (PAL) Bell ... a, Pediatric audiology 16 d, Scope of practice 17 c, American Academy of Audiology 18 b, Otolaryngology practice 19 World war II 20 Georg von Bekesy 21 Marion Downs 22 Doctor of Audiology (AuD)...