The electroacoustic equivalent to SPL is measured with a VU METER. Because the square of the sound pressure is proportional to SOUND INTENSITY, SPL can be calculated in the same manner and is measured ...

The intensity level of higher or lower tones must be raised substantially in order to create the same impression of LOUDNESS. The PHON scale was devised to express this subjective impression of ...

Like the S1 heart sound, the S2 sound is described regarding splitting and intensity. S2 is physiologically split in about 90% of people. The S2 heart sound can exhibit persistent (widened ...