Sound and Hearing

Sound and Hearing - Sound and Hearing Hearing o Like...

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Sound and Hearing Hearing o Like olfaction, hearing is a distance sense o Like touch, the physical stimulus for hearing in mechanical pressure o In contrast to vision, we can detect objects in all direction around the body, we can detect objects around or through visually occluding barriers o Hearing works equally well both day and night whereas to see who need a light source Physical nature of sound o All sounds originate as vibration, which requires mass and elasticity o The energy that initiates the vibration of an object can be exogenous (plucking a guitar string) or endogenous (speech) o Vibration can be periodic (regularly repeating pattern) or random (no repeating pattern, random movement- such as impact sounds) Periodic condensation and rarefraction of air molecules produced by a tuning fork o Hit the tuning fork, impart of energy to it, gets displaced and bounces back (elasticity) air molecules are pushed together, increasing their density, leaving sparsely distributed molecules in their place, vibrating motion of the tuning fork
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Sound and Hearing - Sound and Hearing Hearing o Like...

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