There are several important factors which affect the propagation of sound: geometric spreading, atmospheric effects, and surface effects. These are discussed separately below. Attenuation from a point ...

the intensity at the given sound source in the environment (which is equivalent to the acoustic power of the source), and the distance between source and listener. As a result, determining the ...

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 ...

A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...

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 ...

A S4 heart sound is almost always pathologic. Heart sounds can be described by their intensity, pitch, location, quality and timing in the cardiac cycle. Intensity: Heart sounds can be described ...

The epicentre, 10 km southwest of Red Fort, was well recorded by more than 30 broadband seismic stations installed by the National Center for Seismology.