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Old 01.03.2019, 07:00
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High frequency noise in apartment

Good morning,
Well, not so good, as I should be sleeping, but there is a HIGH FREQUENCY NOISE, which is driving me CRAZY!

I first noticed it, while taking measurements in the empty apartment BEFORE we moved in, but chalked it up to the emptiness and hard surfaces. However, we are approaching four months and it is still present.

Finally, I hired a professional sound technician to come, with highly specialized equipment and he found it to be the food center refrigerator. He said it emitted 5000 Herz. The landlords are kindly willing to purchase a new one, BUT I HAVE MY DOUBTS. Even if I switch off the circuit breaker, the noise does not go away.

No, I do not have tinnitus, though I am worried about the long term effects upon my hearing.

Any suggestions, before we exchange the refrigerator? Thanks for your help.

Last edited by Susan57; 01.03.2019 at 07:02. Reason: Typo
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Old 01.03.2019, 07:13
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Re: High frequency noise in apartment

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Good morning,
Well, not so good, as I should be sleeping, but there is a HIGH FREQUENCY NOISE, which is driving me CRAZY!

I first noticed it, while taking measurements in the empty apartment BEFORE we moved in, but chalked it up to the emptiness and hard surfaces. However, we are approaching four months and it is still present.

Finally, I hired a professional sound technician to come, with highly specialized equipment and he found it to be the food center refrigerator. He said it emitted 5000 Herz. The landlords are kindly willing to purchase a new one, BUT I HAVE MY DOUBTS. Even if I switch off the circuit breaker, the noise does not go away.

No, I do not have tinnitus, though I am worried about the long term effects upon my hearing.

Any suggestions, before we exchange the refrigerator? Thanks for your help.
I don´t understand. If you switch the fridge off and the noise is still there, why replace the fridge? Did you do that with the technician around?
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Old 01.03.2019, 07:18
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Re: High frequency noise in apartment

Well, that is exactly my question. Unfortunately, I was not here when he did the tests, but he also switched it off and on.

I just wrote him an email.... and hope to get some answers.

Apparently, I have dog ears....

https://ask.metafilter.com/307069/Ne...ve-dog-hearing
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Old 01.03.2019, 07:26
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Re: High frequency noise in apartment

How long did you leave the fridge unplugged?

I can sometimes hear the fluid expansion in my fridge. It's a high frequency hiss, more like white noise than a pure tone.

The cooling cycle will still work as long as there's sufficient pressure difference between the high and low side of the system, so if you only turned the fridge off for a moment (and if the fridge is indeed the source of your noise), then you may be hearing the gas in the expansion valve. Try leaving it unplugged for 20-30 min.

Another possibility might be if you have low voltage lighting in the kitchen: if the lights are driven by a solid state invertor, and that is located behind the fridge, then that might be the source of your noise.
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Old 01.03.2019, 07:45
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Re: High frequency noise in apartment

The white noise, like fans and even the ice discharge or filling do not bother me. It’s something else.
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Old 01.03.2019, 08:05
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Re: High frequency noise in apartment

If the fridge is making a noise of 5000Hz, and the noise you hear is inaudible to others, then chances are, it's not the fridge that's bothering you.
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Old 01.03.2019, 08:10
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Re: High frequency noise in apartment

Just a suggestion based on my own experience and trial and error but have you checked how sound the cable connections are? I was also plagued by a high pitched noise which turned out to be coming from a cheap multipoint charger which wasn’t fully pushed into the socket. When I pushed it in, the noise stopped.

Probably doesn’t explain why your noise continues after you’ve switched it off but I thought I’d just throw it into the mix.
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Old 01.03.2019, 08:40
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Re: High frequency noise in apartment

Tinnitus ?
Crickets ?
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Old 01.03.2019, 10:08
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Re: High frequency noise in apartment

It's mousepipes. I'm afraid you've got Nac Mac Feegles.
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Old 01.03.2019, 12:56
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Re: High frequency noise in apartment

Turn off the master switch to your apartments electrical supply.

If the noise goes away, then you know it must be something electrical.

If not... it may be on another circuit (in another apartment) or not electrical.

I also had mouse ears. Now I have tinnitus. And in bed at our french house I hear the sound of water moving in the pipes... in a room where there are no pipes. It is something to do with the combination of tinnitus and the layout of the room and bed. So, sadly, do not rule out that possibility (especially if you are over 40)

Regards


Ian
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Old 01.03.2019, 13:35
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Re: High frequency noise in apartment

Buy an EMF meter and find out yourself, costs 200 EUR and is called
Trifield TF2



You can measure the strength of wifi, radio and magnetic etc. You'll find the source and strength in no time.
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Old 01.03.2019, 14:07
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Re: High frequency noise in apartment

It is also possible that it is coming from one of the neighbours.
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Old 01.03.2019, 14:41
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Re: High frequency noise in apartment

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Finally, I hired a professional sound technician to come, with highly specialized equipment and he found it to be the food center refrigerator. He said it emitted 5000 Herz.



You dont need any highly specialized equipment to check the frequency of a sound. It can be done with an iphone app.


You dont have dog ears.










If anyone cant hear the tone in the video above, then you have a huge problem with your ears. Go to a doctor.





cheers
SC
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Old 01.03.2019, 15:08
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Re: High frequency noise in apartment

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You dont need any highly specialized equipment to check the frequency of a sound. It can be done with an iphone app.

The EMF meter mentioned above is much cheaper than an iPhone.

Just saying...
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Old 01.03.2019, 15:20
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Re: High frequency noise in apartment

For those who are curious as to the frequency range of their hearing, there is this, for example:
https://www.szynalski.com/tone-generator/

I wouldn't recommend headphones and/or excessive volumes.


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Buy an EMF meter and find out yourself, costs 200 EUR and is called
Trifield TF2



You can measure the strength of wifi, radio and magnetic etc. You'll find the source and strength in no time.
If the OP can hear 5GHz Wifi then I would be impressed. I can barely manage 10kHz.
Back in the 1990's I lived near the Swiss Radio International transmitter station in Schwarzenburg. Some people there claimed they could hear the radio from their refrigerators and cookers etc. along with other interesting observations like seeing mysterious blue lights on tin roofs at night etc.
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Old 01.03.2019, 15:42
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Re: High frequency noise in apartment

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If anyone cant hear the tone in the video above, then you have a huge problem with your ears. Go to a doctor.
I just checked, I'm still good to 14k at least (had to try a bunch of headphones, only could hear it with two, but my AKG K240DF are supposed to be flat until 20k, so I must be getting old).

Tom
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Old 03.03.2019, 23:02
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Re: High frequency noise in apartment

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If the fridge is making a noise of 5000Hz, and the noise you hear is inaudible to others, then chances are, it's not the fridge that's bothering you.

Not just me. A lady visitor having lunch with me suddenly blurted out; „ what IS that noise?” I felt like hugging her! Our adult children also hear it, however most men do not.
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Old 03.03.2019, 23:08
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Re: High frequency noise in apartment

I've been suffering a faint high pitched tone in my living room for a couple of weeks which I was convinced was coming from something electrical. Today I went round switching off all electrical items and still the sound was there. I eventually tracked it down to an old radiator thermostat - i just turned the dial slightly and suddenly silence....
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Old 03.03.2019, 23:12
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Re: High frequency noise in apartment

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Not just me. A lady visitor having lunch with me suddenly blurted out; „ what IS that noise?” I felt like hugging her! Our adult children also hear it, however most men do not.
https://www.youtube.com/watch?v=K7QoGfXX788

I would be amazed if anyone can't hear 5,000Hz, I can hear to 14,000Hz without headphones, I don't think that is unusual.
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Old 03.03.2019, 23:34
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Re: High frequency noise in apartment

Oh, I feel for you! Must be soooo annoying.

Since you have several people who, like you, CAN hear the sound, (that's rather reassuring) could you all walk around the flat, turning carefully, to try to locate the source? A bit like that children's game "hot" (for nearby) and "cold" (for further away)?

Because sounds bounce off surfaces, remember to look at what is on the opposite wall from where you hear the sound.

Also: have you checked the hallway, passage and stairwell for sources?
Could you ask the neighbours?

I heard of one person who found the noise outside. The neighbours had set an anti-rodent sound emitting device to deter rodents ("Marder" in German) from gnawing their way through parts of their car.

Last edited by doropfiz; 04.03.2019 at 05:40.
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