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Rotary Heat Exchanger Noise Attenuation

Reference data and engineering information about rotary heat exchanger noise attenuation for acoustics applications.

rotaryheatexchangernoise

Overview

Engineering reference data for Rotary Heat Exchanger Noise Attenuation in acoustics.

Key Formulas

Speed of Sound

c=γRTc = \sqrt{\gamma R T}

Speed of sound in an ideal gas.

Sound Level

L=10log10(I/I0)L = 10 \log_{10}(I/I_0)

Decibel level.

Wavelength

λ=c/f\lambda = c / f

Wavelength = speed / frequency.

Variables

SymbolDescriptionUnit
ccSpeed of soundm/s
LLSound leveldB
λ\lambdaWavelengthm
ffFrequencyHz

Noise Attenuation Frequency Data

8 rows
Typical noise attenuation values for rotary heat exchangers at various frequencies.
Frequency(Hz)
Attenuation(dB)
632
1252
2503
5004
10005
20007
40008
80009

Source: engineeringtoolbox.com

:::note Note that larger inlet or outlet chambers should be calculated separately. :::

Interactive Charts

Signals - Adding Decibels

References