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Hearing Ear Anatomy Dancing hair cell
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Hearing High amplitude F0
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Hearing Low amplitude F0
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Hearing So, what determines the perceived pitch? The wave with the most amplitude or the lowest frequency wave?
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Hearing What Is the F0 of this wave? How do you calculate it?
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Hearing What is the F0 of this wave? How do you calculate it?
What’s “wrong” here?
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Hearing Sometimes a combination of waves produces an F0 that is not the lowest frequency wave, but a lower frequency that isn’t an actual component wave.
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Hearing Hz tone They differ by 200 Hz 400 is two times 200
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Hearing 1400-2800 Hz tone They differ by 1400 Hz
2800 is two times 1400
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Hearing So, how many Hz do octaves differ in 200 or 1400?
At what frequencies do we perceive smaller differences?
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Hearing So, pitch perception doesn’t exactly follow frequency. The mel and bark scales shows when one sound is perceived to be equally distant to another.
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Hearing
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Hearing How do you measure the amplitude of this entire wave if the amplitude is constantly changing?
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Hearing Do amplitude and volume correspond exactly?
How much louder is the first from the second sound? They differ by 10 decibels
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Hearing Source Amplitude In Decibels Times greater than TOH
Threshold of hearing (TOH) Rustling leaves 10 101 Whisper 20 102 Conversation 60 106 Traffic 70 107 Threshold of pain 130 1013 Military jet 140 1014 Eardrum perforation 160 1016
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Hearing So, if you increase amplitude 10 times, how much louder is the sound perceived?
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Hearing So, if you increase amplitude 10 times, how much louder is the sound perceived? Twice as loud
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Hearing This is your cochlea. This is cochlea after too much noise.
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Hearing Which sound is louder? 1, 2, or 3?
The sounds are at 125, 3000, 8000 Hz
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Hearing Which sound is louder? 1, 2, or 3?
The sounds are at 125, 3000, 8000 Hz Their amplitude is identical. What does this say about the resonance curve of the human ear?
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AntiNoise Antinoise Headphones In cars
Dentist drills, airplanes, snoring, etc.
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Frequency and Hearing Human ecolocation
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