1770-4. We have developed a 22.2 multi-channel sound loudness meter that is compliant with the revised Recommendation, and it is now being used for 8K program production. We will continue to ...

An instrument for measuring the level of sound pressure in DECIBELs. Such measurements are called sound level readings. See: SOUND LEVEL. Sound level meters usually ...

The PHON scale was devised to express this subjective impression of loudness, since the DECIBEL scale alone refers to actual sound pressure or sound intensity levels. Historically, the A, B, and C ...