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History and Development of Hearing Aids
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Acoust Soc adjustment amplification ASHA audiogram audiologist Audiology battery binaural hearing aids canal Carhart Chapter characteristics child client Clinical Audiology clinician communication coupler crophone CROS CROS hearing aid Davis H deaf differences ear-level earmold earphone effects electroacoustic feedback fitting frequency range frequency response function gain control HAIC Harford harmonic distortion head shadow Hear Disor Hear Res hearing aid dispenser hearing aid evaluation hearing aid selection hearing aid user hearing impairment hearing loss hearing-aid hearing-impaired hearing-impaired children high frequency individual input instrument Kasten listener low frequency manufacturers master hearing aid measurements microphone mold monaural needs noise normal output patient peak problem procedures professional quency receiver recommended rehabilitation selective amplification sensorineural situation sound pressure level speech discrimination Speech Hear speech intelligibility speech signal standard threshold tube hearing aid unilateral hearing loss vacuum tube vacuum tube hearing variables volume control