AIREDALE R410A - Sound Data Measurement and Interpretation; Sound Measurement Methodologies; Sound Data Considerations

Measurement of Sound Data
All sound data quoted has been measured in the third-octave band limited values, using a Real Time Analyser calibrated
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1995.
Semi Hemispherical
Sound Pressure Levels are calculated from sound power using the semi-hemispherical method where the noise source
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Free Field
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IMPORTANT
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refer to illustration below.
Case breakout sound data is therefore independent of the discharge air and return air sound data.
For non-ducted return air applications, the overall case breakout sound levels may increase, due to the return air sound
being predominant.
Within the conditioned space, sound from in-room ducted discharge air grilles and other equipment will contribute to the
overall sound level and should therefore be considered as part of sound calculations.
Specialist acoustic advice is recommended for noise critical applications.
(2)
(3)
(1)
(1) Return Air
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(3) Discharge Air
Precision Air Conditioning SmartCool™ 16 - 60
29
SmartCool Technical Manual 7525371 V1.2.0_03_2013
Introduction