Generator Noise Level Claim Comparator

Last updated 2026-08-22

Every portable generator's spec sheet has a decibel number on it. What's rarely stated next to that number is how it was measured — and named brands measure it in genuinely different ways. We fetched four brands' own current product pages directly and compared what each one actually states, and how.

One brand names its method. Two use a different method from each other. One states neither. Champion Power Equipment's own product comparison page says outright: "There is no industry standard for testing sound level of a generator. Champion tests under its own conditions to determine the published sound level as a means of comparing one Champion generator to another. Measurements are taken at an average distance of 7m (23 ft.)." Yamaha's own page instead states a load-percentage range with no distance at all. WEN's own current inverter-line page does the same. Westinghouse's own page states neither a distance nor a load — just "as low as." A lower number does not necessarily mean a quieter generator under the same real-world conditions; it may just mean a more favourable test.

Same brand, three different answers: WEN

WEN's own current inverter product pages state noise "at quarter load," with no distance given — that's the row above. But WEN's own page for the 56352, a conventional (non-inverter) 3500W generator, states it a third way: "Noise Rating at 7 Meters: 71 Db" — a distance basis, the same one Champion uses, on a completely different WEN product line. That page itself states the 56352 is discontinued, so it isn't shown as a row above — but WEN's two current conventional models we checked directly, the GN4500 and the 56475, state no dB figure at all on their own current pages. One brand, three different practices — stated distance, stated load, and stated nothing — across its own catalogue.

What this does not do

It does not convert between a distance-based figure and a load-based one — nothing in any brand's own page states a conversion, so none is invented here.
It does not certify that any generator will actually measure at the stated figure at your own property; every brand's own page calls its number approximate or a reference point, not a guarantee.
It compares each brand's loudest stated figure against your limit — Yamaha's and WEN's own quieter, low-load figures are shown too, but the check itself uses the louder end.
It covers one representative portable model per brand checked, not every generator each brand sells.

Runs entirely in your browser. Nothing you type is sent anywhere. The space heater coverage claim comparator found the same "a physically identical rating still gets stated inconsistently by different brands" shape in a different market, and the jump starter engine coverage comparator found it again: an unstandardized headline number that doesn't even agree with itself across one brand's own current lineup. The e-bike motor power claim comparator found a close cousin: a federally regulated number some brands quietly keep off the page altogether.