![]() Most sound-level measurements will be made relative to this reference, meaning 1 Pa will equal an SPL of 94 dB. The proper notations for sound pressure level using this reference are L p/(20 μPa) or L p (re 20 μPa), but the suffix notations dB SPL, dB(SPL), dBSPL, or dB SPL are very common, even if they are not accepted by the SI. TOR stands for The Onion Router, and the name makes more sense than one might think.Which is often considered as the threshold of human hearing (roughly the sound of a mosquito flying 3 m away).
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