[just wondering]

"Knack" wrote in
:

We currently have one of the quietest ceiling fan models in our
bedroom, but I'm wondering if I can suppress that fan noise even
further. However, we don't want to wear earplugs or noise-cancelling
headphones while we sleep.

Just an idea-- Was wondering if it could be possible to somehow make
the sensor and signal processor of one of those noise-canceling
headphones (For example, Panasonic RP-HC500) drive a larger amplifier,
which would in turn power a pair of small cheap PC type speakers. The
little speakers could then be spaced apart above the headboard of our
bed.

Was hoping that I could obtain all components that I need (except the
RP-HC500 and the PC speakers) at Radio Shack or some other local
electronics components retailer. However, I'm not an electronics
tinkerer so I have no clue as to what the specs would be for those
components.

From school (long ago) I have a vague and very limited knowledge of
electronics (Ohm's law, impedence matching), but know nothing about
amplifiers and next to nothing about filters/tuners.

Don't want to spend more than a total of US$400 on this. Is the idea
feasible? If so, then if someone could give me some tips/steering
about the specifics of what I would need, then I'd be greatly
appreciative.



Just to bring some sanity to the discussion, let me point out that what
can vs can not be done will depend on the characterstic of the fan noise
that you want to cancel. Since you don't give any detials, there really
is no difinitive answer. Perhaps the fan motor is coupling 120Hz to the
ceiling structure and the ceiling is acting as a sound board. If this is
the case, mechanically isolating the fan would help. An alternative to
active noise cancellation would be to reduce the speed of the fan.