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What machine measures decibels?

Updated: 9/15/2023
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15y ago

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Many kinds of instruments measure signals in decibels (dB). Since dB represents nothing more than a log ratio of two quantities, anything that can be quantized could be measured in dB. The most common things measured that way, however, are: * Sound Levels (an SPL Meter)
* Electrical power levels (a Network Analyser, a Spectrum Analyser, Power Meters)
* Light levels (an Optical Spectrum analyser or Power Meter). Note that dB is always a relative term, however figures are often quoted with respect to some reference such as 'dB(SPL)" used for sound where the reference is the quietest sound a human can hear, or dBm for electrical power where the reference is 1 mW.

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Q: What machine measures decibels?
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What is a machine that measures decibels?

An SPLOIUYTR machine measures decibels.


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