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the claim

Electrical hum from power equipment always sounds at the pitch of a B-flat.

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that electrical hum from power equipment always sounds at the pitch of a B-flat?

No. One reference source on mains hum states the fundamental hum frequency is twice the local power-line frequency, i.e. 100 Hz or 120 Hz, which is not the pitch of a B-flat. The remaining retrieved items concern unrelated electrical engineering or music topics and settle nothing.

Verdict: REFUTED · 0 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence against · 1
Mains hum - Wikipedia
Get citation
Mains hum - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Mains_hum

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