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Band-limited power flow into enclosures. II
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1980
Year
AeroacousticsEngineeringPower InflowPower ElectronicsElectromagnetic CompatibilityFrequency BandEngineering AcousticPhysical AcousticBand-limited Power FlowAcoustic MaterialNoiseElectric Power TransmissionComputational ElectromagneticsPower Inflow CalculationSound PropagationAcoustic AnalysisAcoustic MethodsElectrical EngineeringEnergy HarvestingSound ControlElectrical TransmissionTransmission LineChamber AcousticElectrical Insulation
In the parent paper [J. Acoust. Soc. Am. 62, 906–911 (1977)] expressions were presented for band-limited sound power flow into an enclosure in the low-frequency regime where acoustic and structural modes are thinly scattered. Results for transmission by structural modes resonant below and within the frequency band of interest were given. The transmission was assumed to be to resonant acoustic modes of the enclosure. This addendum presents an additional expression for calculating power flow to nonresonant acoustic modes of the enclosure (modes resonant above and below the frequency band of interest) from structural modes resonant below, within, and above the band. If no resonant acoustic modes exist in a band, the new results can be used to predict the power inflow. If resonant acoustic modes do exist, the results can be used to increase the precision of the power inflow calculation. The procedure to be used in the calculation of the sound level in the enclosed space is presented.