Polymers, whether natural or artificial, are big molecules made by linking up smaller repeating chemical units. The most common âbackbonesâ for polymers are chains of carbon or silicon, each of which can bond to four other atoms. Polymers, whether natural or artificial, are big molecules made by linking up smaller repeating chemical units.
Details About Pitch. Although for most practical purposes, the pitch of a sound can be said to be simply a measure of its frequency, there are circumstances in which a constant frequency sound can be perceived to be changing in pitch.
In addition to sound level meters, dosimeters and octave band analyzers can be used to measure noise levels, as well as identify specific sources of noise. Sound level meters are often used in the workplace to evaluate the level of unwanted noise.