[time-nuts] beats was Re: If there a FAQ

William H. Fite omniryx at gmail.com
Tue Nov 30 16:42:27 UTC 2010


Something my primary flight instructor pointed out to me years...yea,
decades ago.  Haven't thought about it since then.

I expect you can do the same thing with an electric fan.
Bill



On Mon, Nov 29, 2010 at 1:53 PM, Mike Naruta AA8K <aa8k at comcast.net> wrote:

>
> Have you ever tried humming while watching a propeller?
> The strobe effect is fascinating.
>
> My flight instructor thought that I was crazy until he tried it.
>
>
> Mike - AA8K
>
>
>
> On 11/29/2010 09:51 AM, jimlux wrote:
>
>>
>> if one has a voltmeter (or total power detector, like your ear), hearing
>> low frequency beats at sub-1Hz is easy.. (anyone who has tuned an
>> instrument by ear, or sat in a plane with poorly synchronized engines
>> will know this)
>>
>>
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