Frequency: Frequency is the range of sounds (low to high) that a sound level meter can hear. The human ear, for instance, can hear frequencies from 20 to 20,000 hertz (Hz).

Therefore, if the measured sound level on the C network is much higher than that on the A network, much of the sound energy is concentrated in the low frequency region (see INFRASONIC). Since the A ...

While air has direct contact with the body, its vibratory motion is not usually forceful enough, except when moving hair, to trigger mechanoreceptors except at high sound pressure levels. For sound ...

Sensationalistic reports on the dangers of low-frequency sound originate from the unscientific research of the Russian-born French scientist Vladimir Gavreau in the 1960s.

Novosund has created an ultrasound sensor that allows real-time blood pressure sensing without any cuff hassles. It is ready for smartwatches, and even rings.

A wearable blood pressure monitor uses sound to continuously record vital sign data. Achieving continuous, noninvasive blood pressure monitoring has long been a medical objective due to its ...

The term most often used in measuring the magnitude of sound. It is a relative quantity in that it is the ratio between the actual SOUND PRESSURE and a fixed reference pressure. This reference ...