The AMPLITUDE of these pressure variations (that is, their maximum displacement from the ambient atmospheric pressure) is called the sound pressure variation, whereas the effective pressure variation ...

and is given a value of 0 dB. Since the square of the sound pressure is proportional to the sound's intensity the equation for calculating sound pressure level is much the same as for sound intensity, ...

High blood pressure, also known as hypertension, occurs when a person’s blood pressure reaches above 140/90 mmHg or higher. This can be chronic, and while it can be harmless, it can also develop ...