What is up with Noises? (The Science and Mathematics of Sound, Frequency, and Pitch) Resonance: Clocks, Wineglasses, Radio and Cycles. Acoustics. Abatement and Distance from Source The disruption of sound pressures waves which reduces the noise is called attenuation - Sound Pressure Level Calculator Acceptable Noise - dBA - Levels Acceptable noise - dBA - levels at some locations Acoustic Calculation of Ventilation Systems A procedure for acoustic noise calculation of ventilation systems.
