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Aural Rehab 10-16-07 - Chapter 4 model not on test Oral...

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Chapter 4 model not on test Oral communication: Auditory information- Visual information- Environment- suitable for Auditory Perception: Exposed to auditory information, languages of the community Unborn Babies can hear before they are born Northern and Downs Lots of work on auditory perception PERCEPTION Frequency- 20-2000 Hz Our perception of sound…. High pitch sounds have to be loud for us to hear them Best range between 3000-4000 Hz 0-130 dBls spl (sound pressure level) 340,000 different tones w/I the 0-130 dbl spl Speech Occurs within a 45dB range Normal conversation speech 1m from the speaker is on average 65 dB SPL Average Shout (yell) 85dB SPL Faint Speech 1m from the speaker is 45 dB SPL Distance from a speaker Different intensities of different speech sounds (aww) loudest sound in English (theata) quietest sound in English Vowels have a greater intensity than consonants Male voices are louder than females… deeper voice, larger anatomical structure Speech 50-10,000 Hz Intensity: Below 1,000 Above 1,000 drops off very quickly Male fundamental frequency 125-150 Female f.f. 225-250
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