Understanding Bruits: Types and Measurement Techniques

Bruit refers to the noise or sound produced by a machine or a system. In engineering, bruits are used to measure the noise level of a system or a machine. The term "bruit" is derived from the French word for "noise".

There are different types of bruits, including:

1. Airborne Bruit: This type of bruit is caused by the movement of air through a system or a machine. It is commonly measured in decibels (dB) and is used to evaluate the noise level of aircraft, cars, and other machines that produce airborne noise.
2. Structural Bruit: This type of bruit is caused by the vibration of structures, such as buildings or bridges. It is measured in units of acceleration and is used to evaluate the structural integrity of a system or a machine.
3. Acoustic Bruit: This type of bruit is caused by the interaction of sound waves with a system or a machine. It is measured in decibels (dB) and is used to evaluate the noise level of a system or a machine.
4. Vibration Bruit: This type of bruit is caused by the vibration of a system or a machine. It is measured in units of acceleration and is used to evaluate the vibrational integrity of a system or a machine.

In summary, bruits are used to measure the noise level of a system or a machine, and there are different types of bruits, including airborne, structural, acoustic, and vibration bruits.