1 Intensity Scales Exponents Logarithms dB dB SPL.
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Transcript of 1 Intensity Scales Exponents Logarithms dB dB SPL.
![Page 1: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/1.jpg)
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Intensity
• Scales• Exponents• Logarithms• dB• dB SPL
![Page 2: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/2.jpg)
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Scales
• Linear
• Ratio
![Page 3: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/3.jpg)
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Exponents
• Shorthand method of displaying very large or small numbers
• Numbers greater than 1 involve positive exponents
• Numbers less than 1 involve negative exponents
![Page 4: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/4.jpg)
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Logarithms
• Base 10 logarithms used in the decibel• Examples
• 1000 = 10 4 = 4• 1 = 10 0 = 0• .001 = 10 -3 = -3
![Page 5: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/5.jpg)
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Decibel
• Standard measure of intensity• dB = 20 (log Po / Pr)
• Where Po = pressure output• Where Pr = pressure reference
![Page 6: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/6.jpg)
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dB SPL
• Decibel Sound Pressure Level (dB SPL)• Standard reference level.• dB SPL = 20 (log Po / 20µPa)
• Where Pa = Pascal (measure of force)
• dB SPL = 20 (log Po / .0002 dynes/cm2)• Where dynes are a measure of force
![Page 7: 1 Intensity Scales Exponents Logarithms dB dB SPL.](https://reader036.fdocuments.us/reader036/viewer/2022082713/5697c0151a28abf838cce073/html5/thumbnails/7.jpg)
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Summary