Birdwatch Note Rating
2024-01-01 18:18:15 UTC - HELPFUL
Rated by Participant: B01FD079FB58F14A311B1CAEA211C18D88CAC07CEC02840B92CB23E17DBC8B3B
Participant Details
Original Note:
Negative dBs can't exist acoustically, as it represent the sound pressure level (SPL) of an acoustic sound wave. 0dB SPL mean absolute no air particles movement which is impossible outside vacuum conditions. Negative dBs can exist as a reference to a base (zero) dB level. https://www.animations.physics.unsw.edu.au/jw/dB.htm
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