Hearing aids: standards, options, and limitations
Like its popular first edition, this book stresses a fundamental but frequently overlooked truth: the process of ordering hearing aids is as important as selecting and verifying hearing aid fittings. In this revised and expanded second edition, you will find all the information you need to confidently order hearing aids, including entirely new chapters and updates that reflect the latest developments and technology in this fast-moving field. Packed with beneficial tables and diagrams, the text provides current and comprehensive guidelines on analyzing different microphones, receivers, telecoils, and amplifiers; problems of distortion, noise, and the central nervous system; and the effect of these problems on hearing aid function. Book jacket.
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Amplifiers and Circuit Algorithms of Contemporary
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2-cc coupler Acoust Soc adjustment amplitude ANSI attenuation Audiol audiologist auditory battery binaural bore characteristics circuit class A amplifier coherence compression hearing aid compression ratio compression threshold curves dB SPL device diameter dynamic range ear canal ear simulator eardrum earhook earmold effect electroacoustic equivalent input noise feedback filter frequency response function gain control harmonic distortion Hear Instrum hearing aid fitting Hearing Aid Performance hearing-impaired high-frequency higher frequencies impedance increased induction input level input signal insertion gain KEMAR Killion linear hearing aid listening low frequencies low-frequency Lybarger magnetic measurement microphone middle ear monaural noise input normal output SPL patient peak clipping potentiometer Preves quency real ear receiver recognition scores reduced reported resonance REUR S3-48 working group saturation sensorineural hearing loss signal processing sound quality spectrum Speech Hear Res speech recognition subjects switch telecoil tion transducer typical vent