| 11. | At ordinary sound pressure levels, most humans can hear down to about 20 Hz.
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| 12. | In acoustics, loudness is the subjective perception of sound pressure.
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| 13. | The treatment of sound pressure level is inconsistent with standard reference works across Wikipedia.
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| 14. | Root-mean-square sound pressure being obtained with a standard frequency weighting and standard time weighting.
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| 15. | Sound pressure is measured using a microphone and particle velocity using a particle velocity probe
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| 16. | This allows independent control of the sound pressure levels for the audience and the performers.
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| 17. | And as interference decreases, so does the phase difference between sound pressure and particle velocity.
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| 18. | Decibels _ named after Alexander Graham Bell _ are the universal measure of sound pressure.
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| 19. | The sound field can be described using physical quantities like sound pressure and particle velocity.
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| 20. | There are 15 SP ( Sound Pressure ) classes and 5 Park & Pound classes.
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