Speech Science Exam 1
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| Sound level is expressed in terms of _______ | Intensity
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| Amplitude of ______ is related to sound intensity | Vibration
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| The _________ measures the relative intensity between two sounds | Decibel
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| Decibel (dB) | Unit of intensity that is really a ratio; a tenth of a Bel
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| Bel | A unit corresponding to an intensity ratio of 10 to 1
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| Decibels use ________ in order to map the wide value range of our perception | Logarithmic scale
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| A doubling of intensity increases sound by approximately _________ | 3 dB
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| dB does not correlate with? | What we perceive
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| We cannot estimate sound intensity by? | What we hear
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| 3 dB increases is _______ noticeable | Barley
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| 10 dB increase will sound ______ as loud | 2x
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| (Logarithmic basics) The log of any number can be expressed as? | An integral exponent of 10 (count the zeros)
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| (Logarithmic basics) Numbers greater than 1 have _________, less than 1 will have __________ | Positive logs, negative logs
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| Decibels are based on relative differences in intensity, they require a ______ | Reference value
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| What are the two ways to measure sound intensity? | dB IL (intensity level) and dB SPL (sound pressure level)
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| dB IL (intensity level) | Measures the output intensity
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| What is the formula for dB IL? | dB IL=10 (log10 Wo/Wr)
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| dB SPL (sound pressure level) | Measures sound pressure level at the ear drum
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| What is the formula for dB SPL? | dB SPL=20 (log10 Po/Pr)
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| Power is measured with the unit of _______ | Watt
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| Power is ______ over time | Energy
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