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.
noun. 1 A unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale. Example sentences. 1  Because the range of sound pressures that can be heard is so large, a logarithmic scale of decibels is used to measure sound intensity.oun. 1 A unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale. Example sentences. 1  Because the range of sound pressures that can be heard is so large, a logarithmic scale of decibels is used to measure sound intensity.