Sound pressure level definition

Sound pressure level means twenty times the logarithm to the base 10 of the ratio of the effective pressure (µPa) of a sound to the reference pressure of 20 µPa;
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Sound pressure level of a sound, in decibels, means twenty (20) times the logarithm to the base ten of the ratio of the pressure of the sound to a reference pressure which shall be explicitly stated.
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Sound pressure level. (SPL) means 20 times the logarithm to the base 10 of the ratio of the RMS sound pressure to the reference pressure of 20 micropascals (20x10µN/m). The sound pressure level is denoted Lp, or SPL and is expressed in decibels.
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Examples of Sound pressure level in a sentence

  • DIFFERENCE: 0 1 2 3 4 5 to 9 10 or More FACTOR: 10 7 4 3 2 1 0 Sound pressure level due to equipment equals sound pressure level with equipment "on" minus FACTOR.

  • Sound pressure level, described in decibels (dB), is used to quantify sound intensity.

  • The “A” weighting scale is used todescribe human response to noiseSPL Sound pressure level (SPL), fluctuations in pressure measured as 10 times a logarithmicscale, the reference pressure being 20 micropascalsHertz (Hz) Cycles per second, the frequency of fluctuations in pressure, sound is usually acombination of many frequencies togetherVTG Vertical temperature gradient in degrees Celsius per 100 metres altitude.

  • Sound pressure level is expressed as the ratio of a measured sound pressure and a reference level.

  • Sound pressure level would be monitored on twenty-four hourly basis.


More Definitions of Sound pressure level

Sound pressure level means twenty (20) times the logarithm to the base ten (10) of the ratio or the pressure of a sound to the reference pressure of twenty (20) micronewtons per square meter (20 × 106 newtons/meter2), and is expressed in decibels.
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Sound pressure level means, indecibels, 20 times the logarithm to the base ten of the ratio of a sound pres- sure to the reference sound pressure of20 micropascals (20 micronewtons per square meter). In the absence of any 40 CFR Ch. I (7–1–11 Edition)modifier, the level is understood to be that of a root-mean-square pressure.
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Sound pressure level means the sound pressure mapped to a logarithmic scale and reported in decibels.
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Sound pressure level means a sound pressure level of a sound, in decibels, as defined in ANSI Standards 51.2-1962 and 51.13-1921; that is, twenty (20) times the logarithm to the base ten
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Sound pressure level means a sound pressure level of a sound, in decibels, as defined in ANSI Standards 51.2-1962 and 51.13-1921; that is, twenty (20) times the logarithm to the base ten (10) of the ratio of the pressure of the sound to a reference pressure, which reference pressure shall be explicitly stated.
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Sound pressure level means the level of a sound measured in dB units with a sound level meter which has a uniform (“flat”) response over the band of frequencies measured.
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Sound pressure level of a sound, in decibels, means 20 times the logarithm to the base 10 of the ratio of the pressure of this sound to the reference sound pressure having the value of 2 x 10-4 dynes per square centimeter.
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