High pitched sound in house
High pitched sound in house
(OP)
Hello I am trying to determine what is causing a high pitched sound near my side door. I tried turning off the power for over half an hour and natural gas. Tried banging on the walls and went to the roof to check the roof vents. The sound started a couple of weeks ago and I cannot think of any changes around the house.
The sound meter identifies the frequency as near 7,000 hz. Any ideas on what could emit a sustained constant sound at such a high frequency? Any help would be appreciated.
EDIT THE INSANITY IS OVER
the culprit was a small cat toy that squeaks when batted, it was located in the general area but when approached it was not where the sound was strongest.
The sound meter identifies the frequency as near 7,000 hz. Any ideas on what could emit a sustained constant sound at such a high frequency? Any help would be appreciated.
EDIT THE INSANITY IS OVER
the culprit was a small cat toy that squeaks when batted, it was located in the general area but when approached it was not where the sound was strongest.
RE: High pitched sound in house
RE: High pitched sound in house
RE: High pitched sound in house
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: High pitched sound in house
Anything in basement below the door or in floor/attic above the door?
Most sound meters have an omni-directional microphone. You could make a crude directional microphone modification by placing a plastic tube about 12" long slipped over the microphone. It might help to detect the sound source; whether within the wall cavity, inside a hole in wall/door, or reflected from your neighbor's home. Some possible electronic stuff that may emit that frequency: phone or cable service box, electronic door lock, outdoor video, indoor security system, door bell, and light ballast.
Walt
RE: High pitched sound in house
RE: High pitched sound in house
RE: High pitched sound in house
I was using my cell phone I can see what I can do about making it more directional or purchasing a proper sound meter.
The power and cable service box don't seem to be making any noise and are about 10 feet away on the exterior. I don't have an electronic door lock, camera, or electronic security system. My door bell is an 1970-80 wired connection. I disconnected the wires on the outside and inside at the bell, the sound remains. I have a recessed light at the entrance don't believe there was a ballast but I tried turning off the power for at least half an hour which I believe would run out most capacitors and still the sound remains.
Thank you for the suggestions.
RE: High pitched sound in house
https://www.szynalski.com/tone-generator/
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: High pitched sound in house
http://onlinetonegenerator.com/
My suggestion would be to verify the frequency you are hearing matches the one (7 kHz) on your phone's audio analyzer app. In lieu of a directional microphone you could use your body as a shield/barrier (rotate body while holding phone close) to verify that when standing outdoors the sound is from your wall/door and not from an external sound source. There is not many physical sound sources that have not been mentioned or thought about. A toilet tank leak or other valve (water or air) could possible cause a high frequency sound; but 7 kHz is quite high!
Perhaps there is some RF interference affecting your phone. I was testing a ship cargo hatch for leaks with an ultrasound meter and transmitter. I could hear a radio station in the headphones at specific locations on the deck! I also had a situation where my neighbor's ham radio antenna was a source of interference.
Please let us know if you find the noise source and eliminate it.
Walt
RE: High pitched sound in house
What has happened with the noise in the last 5-days?
Walt
RE: High pitched sound in house
the culprit was a small cat toy that squeaks when batted, it was located in the general area but when approached it was not where the sound was strongest.
RE: High pitched sound in house
As I recall, our brain senses the direction of a sound in part by comparing the phase at each ear (along with comparing the amplitude).
That phase comparison approach doesn't work at frequencies where Lambda / 2 is less than the distance between your ears.
v = 343 m/sec
f = 7000 hz
lambda = v / f= 0.049 m ~ 2 inch
lambda / 2 ~ 1 inch
That may be part of the reason that it was difficult for you to localize the sound.
Of course there may be other reasons like echoes.... or maybe a mischievous cat that was just having fun playing with its human (by waiting for you to go away before batting the toy again)!
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(2B)+(2B)' ?
RE: High pitched sound in house
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: High pitched sound in house
https://www.bing.com/videos/search?q=cat+toys+that...
Here is the time wave and spectrum (red is maximum and blue is average):
Everyone feeling bad about not guessing that the noise was from a mouse toy!
Walt
RE: High pitched sound in house
RE: High pitched sound in house
https://www.csmonitor.com/1985/0812/ahum.html
http://www.oldsaltblog.com/2013/10/the-hum-heard-r...
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: High pitched sound in house
RE: High pitched sound in house
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(2B)+(2B)' ?