Phthalates are another class of chemicals that are often used in deodorants and antiperspirants that you may want to avoid. Phthalates are used in cosmetics, synthetic fragrances, plastics, body care products and medical goods. They help to dissolve other ingredients and to create a better consistency.
A harmonic is a signal or wave whose frequency is an integral (whole-number) multiple of the frequency of some reference signal or wave. The term can also refer to the ratio of the frequency of such a signal or wave to the frequency of the reference signal or wave.
Report Abuse. In physics, amplitude is the maximum displacement of a periodic wave. It is also the height of a wave and is used to describe the instanteous value of a varying waveform.In sound, it is strength of a vibrating wave.eport Abuse. In physics, amplitude is the maximum displacement of a periodic wave. It is also the height of a wave and is used to describe the instanteous value of a varying waveform.