The ear is not equally sensitive to all frequencies, particularly in the low and high FREQUENCY ranges. The RESPONSE to frequencies over the entire AUDIO range has been charted, originally by Fletcher ...

Because the square of the sound pressure is proportional to SOUND INTENSITY, SPL can be calculated in the same manner and is measured in DECIBELs. Two SPL measurements in decibels may be combined with ...

We have now observed for this small sound wave-length that, when the sound intensity is slowly increased, the number of these maxima diminishes. Further, the emphasis appears to shift towards the ...

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 ...