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HEARING SOUND - HEARINGSOUND (pure tone),000Hzdouble...

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HEARING SOUND  -physical stimuli that prompts sense of hearing is sound waves-changes in pressure  caused by molecules of air or fluid colliding and moving apart -simplest sine wave (pure  tone) from tuning fork -human ear responds to frequencies 20Hz--20,000Hz-double  bass 50Hz -sound requires a medium to move through: air, water, solid -hearing also adapts-living in city don't hear noise Frequency Measured in the unit hertz, the number of sound waves or cycles per second, determining the pitch of sound Amplitude measured in decibels, the magnitude or intensity of a sound wave, determining the loudness of the sound; in vision the amplitude of a light wave affects the brightness Decibel A unit of measurement of the intensity or loudness of a sound bases on the amplitude of a wave Timbre The distinctive quality of a sound that distinguishes it from other sounds of the same pitch and loudness THE EAR
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