Health

Continuous, noninvasive blood pressure monitoring using sound

A wearable blood pressure monitor uses sound to capture a continuous record of the vital sign data. Continuous, noninvasive blood pressure monitoring has been a longtime goal of medicine, given blood pressure's utility as ...

Frequency

Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example, if a newborn baby's heart beats at a frequency of 120 times a minute, its period (the interval between beats) is half a second.

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