acoustic radiation pressure
Noun (Physics/Acoustics): The steady, time-averaged pressure exerted on a surface by a sound wave. This pressure arises because a sound wave carries momentum, and when it is absorbed or reflected by a surface, it transfers that momentum, resulting in a net force. It is distinct from the oscillating pressure of the sound wave itself and is a second-order, nonlinear effect.
This term is used in technical contexts within physics, engineering, and acoustics to describe the force sound can exert on objects. * The acoustic radiation pressure from the ultrasonic transducer was sufficient to levitate small droplets. * Researchers measured the acoustic radiation pressure to calibrate the intensity of the high-frequency beam. * The phenomenon of acoustic radiation pressure is key to understanding acoustic levitation devices.
- Acoustic Radiation Pressure in Microfluidics: It is used to manipulate cells or particles without physical contact, enabling applications like acoustic tweezers.
- Theoretical Distinction: It is often calculated as the difference between the average pressure on a surface in the presence of the wave and the static pressure that existed before the wave was applied.
- Radiation Pressure: A more general term for pressure exerted by any form of electromagnetic or acoustic radiation (e.g., light pressure from a laser).
- Acoustic Force: A broader term that can encompass forces due to acoustic radiation pressure and other acoustic phenomena like acoustic streaming.
- Sound Pressure: Refers to the instantaneous, oscillating pressure variation of the sound wave itself, which is a first-order linear effect, in contrast to the steady acoustic radiation pressure.
- Sound radiation pressure
- Mean pressure of a sound wave (technical description)
- Acoustic Levitation: A technology that uses acoustic radiation pressure to counteract gravity and suspend objects in mid-air.
- Momentum Transfer of Sound: The fundamental principle explaining acoustic radiation pressure.
- Nonlinear Acoustics: The branch of acoustics that studies effects like acoustic radiation pressure, which depend on the square of the wave amplitude.
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(acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave
