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A proposed method for measuring the noise of domestic appliances

✍ Scribed by G.M. Jackson; H.G. Leventhall


Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
778 KB
Volume
6
Category
Article
ISSN
0003-682X

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✦ Synopsis


The method was developed on behalf of the Society of British Gas Industries, as an alternative to reverberation chamber power measurements on gas appliances. It is equally applicable to other than gas-fired domestic appliances and consists of producing acoustically-average domestic environments in a test chamber; the advantage being that measurements made in the simulated environments are automatically compensated for the individual directional characteristics of the appliance under test.

The standardisation of average domestic environments involved the measurement of the reverberation times of a hundred domestic rooms, z From these measurements it was possible to estimate the expected deviations in measured noise levels between djfferent rooms. Measurements made on a standard noise source hl the simulated rooms and in the field show the predicted spreads h7 noise level to be approximately as expected.


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## Abstract A new method for the determination of a distributed FET noise model is presented. It is based on the extraction of the intrinsic noise‐correlation matrix of an elemental section of the device from the device's noise figure, measured for only one source‐impedance state at a number of fre