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MECHANISM OF SPEAKING
CHARACTERISTICS OF SPEECH WAVES
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acoustic amplitude apparatus approximately articulation attenuator audiogram audiometer average speech basilar membrane beats Bell Telephone Laboratories Chapter characteristic circuit cochlea complex sounds component frequencies condenser transmitter consonants corresponding curves CUT OFF FREQUENCY cycles per second decibels determined diaphragm distance distortion effect electrical eliminated energy equally loud equation feet FIGURE fricative consonants fundamental given gives harmonics hearing loss helicotrema high frequencies HIGH PASS indicated inner ear instrument INTENSITY LEVEL LOW PASS masking tone maximum measure method microwatts musical tones nerve fibres normal observers obtained oval window phase phonetic phonodeik pitch produced pure tones quencies records resonant room noise scala tympani scala vestibuli scale sensation level sensation units shown in Fig sound wave source of sound speech power speech sounds stimulation subjective tones syllable Table telephone receiver tests threshold of audibility tion transmission transmitted tube unvoicnd vacuum tube values vibration voice vowel vowel sounds