"Frequency" refers to the number of vibrations per second. Light consists of electromagnetic waves, that is, vibrations (or regular changes) in the electric and magnetic fields, that propagate as a wave.
acoustics
Beats
Sound quality is the term for the bending of overlapping sound wave frequencies through interference.
vibration or brownian motion
Stapedectomy
There is no special name. The term irregular is not appropriate because a rhombus is irregular but it has equal sides.
Hertz are used to measure cycles per second. Sound is measured in hertz. I hope I understood the question.
Low frequency sound is usually called "infrasound" analagous to the term "infrared" for light of less than visible wavelengths. Subsonic has also been used.
Irregular means it's not regular.
The repetition of a vowel sound is called assonance. This literary device is often used to create a musical or rhythmic effect in writing.
Percussion means eliciting sounds or vibrations by tapping.
what is it
It is irregular
Seismic waves / seismicity.
An irregular hexahedron.
Anomalous