PSYC 367 Lecture : May 29_Audition Speech Production.docx

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4 Oct 2012
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Sound waves are pressure fluctuations in air molecules: Sound waves are described by the frequency(pitch, hz) and amplitude (loudness/intensity, db ) of pressure fluctuation; complexity(timbre ): Audibility curve: there"s a relationship between the different frequency you hear and how loud the sound that will allow you to hear. Sound of 400-6,000 hz can be heard by very low amplitude/loudness our hearing is most sensitive to the range of frequency of human speech: the auditory system: Outer ear: pinna: normally in mammals; come in different sizes and purpose (e. g. elephant"s big pinna help to cool down the blood, radiate heat); to collect and slightly amplify sound waves, and to aid in auditory localization. Ossicles : the three smallest bones in the human body; transmit sounds from the air to the inner ear. Malleus (hammer): receives vibration from the tympanic membrane and is attached to the incus.

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