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Sound level meter - Wikipedia

    https://en.wikipedia.org/wiki/Sound_level_meter
    From Wikipedia, the free encyclopedia An integrating-averaging Cirrus Research's Optimus sound level meter which complies with IEC 61672-1:2002 A sound level meter (also called sound pressure level meter ( SPL )) is used for acoustic measurements. It is commonly a hand-held instrument with a microphone.

Power meter - Wikipedia

    https://en.wikipedia.org/wiki/Power_meter
    Power meter From Wikipedia, the free encyclopedia Power meter may refer to: Electricity meter measures electrical energy (electrical power supplied to a residence, business or machine over time) Wattmeter measures the electrical power circulating in any electric circuit Microwave power meter measures power in a microwave signal

Audio system measurements - Wikipedia

    https://en.wikipedia.org/wiki/Audio_system_measurements
    Audio system measurements From Wikipedia, the free encyclopedia Audio Precision APx525 analyzer for making audio system measurements Audio system measurements are a means of quantifying system performance. These measurements are made for several purposes. Designers take measurements so that they can specify the performance of a piece of equipment.

VU meter - Wikipedia

    https://en.wikipedia.org/wiki/VU_meter
    A volume unit ( VU) meter or standard volume indicator ( SVI) is a device displaying a representation of the signal level in audio equipment. The original design was proposed in the 1940 IRE paper, A New Standard Volume Indicator and Reference Level, written by experts from CBS, NBC, and Bell Telephone Laboratories.

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