Definition of Parametric array
A parametric array, in the field of acoustics, is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the diffraction limit (a kind of spatial 'uncertainty principle') associated with linear acoustics. The main side lobe-free beam of low frequency sound is created as a result of nonlinear mixing of two high frequency sound beams at their difference frequency. Parametric arrays can be formed in water, air, and earth materials/rock.
Related terms
Acoustic theory
Acoustic theory is a scientific field that relates to the description of sound waves. It…
Underwater acoustics
Underwater acoustics (also known as hydroacoustics) is the study of the propagation of…
Zakharov–Schulman system
In mathematics, the Zakharov–Schulman system is a system of nonlinear partial…
High-frequency impulse-measurement
HFIM, acronym for high-frequency-impulse-measurement, is a type of measurement technique…
Direct-field acoustic testing
Direct-field acoustic testing, (DFAT), is a technique used for acoustic testing of…
Megasonic cleaning
Megasonic cleaning is a specialized cleaning method that utilizes high-frequency sound…
Nonlinear acoustics
Nonlinear acoustics (NLA) is a branch of physics and acoustics dealing with sound waves…
Room acoustics
Room acoustics is a subfield of acoustics dealing with the behaviour of sound in…
Acoustic dispersion
In acoustics, acoustic dispersion is the phenomenon of a sound wave separating into its…
Frequently asked questions
What is Parametric array?
A parametric array, in the field of acoustics, is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the…