A proposed method for measuring the noise of domestic appliances
β 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
No coin nor oath required. For personal study only.
β¦ 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 noiseβcorrelation matrix of an elemental section of the device from the device's noise figure, measured for only one sourceβimpedance state at a number of fre