Noise
1. Noise is an irregular fluctuations that accompany a transmitted electrical signal but are not part of it and tend to obscure it.
2. Noise – random fluctuations of different physical nature are complex temporal and spectral structure.
3. Noise is unwanted electrical or electromagnetic energy that degrades the quality of signals and data. Noise occurs in digital and analog systems and can affect files and communications of all types, including text, programs, images, audio, and telemetry.
Types of noise:
1. Continuous noise
Continuous noise is exactly what it says on the tin: it’s noise that is produced continuously, for example, by machinery that keeps running without interruption. This could come from factory equipment, engine noise, or heating and ventilation systems.
2. Intermittent noise
Intermittent noise is a noise level that increases and decreases rapidly. This might be caused by a train passing by, factory equipment that operates in cycles, or aircraft flying above your house.
3. Impulsive noise
Impulsive noise is most commonly associated with the construction and demolition industry. These sudden bursts of noise can startle you by their fast and surprising nature. Impulsive noises are commonly created by explosions or construction equipment, such as pile drivers.
4. Low-frequency noise
For low-frequency noise, you should be using a sound level meter with third octave band analysis, so you can analyse the low frequencies that make up the noise. You may also need to look at the C-weighted measurements and compare this to the A-weighted measurements, as this can show how much low-frequency noise is present.
YourDictionary https://www.yourdictionary.com/
Merriam-Webster's Collegiate® Dictionary, Eleventh Edition https://www.merriam-webster.com/dictionary
What are the 4 Different Types of Noise? https://www.cirrusresearch.co.uk/blog/2020/04/4-different-types-noise/