High pich sound capture / analyze

Paul Johnson

Freshman
Oct 27, 2012
89
6
8
In your picture there are no spikes visible that any engineer would single out as a problem. The ONLY thing Samsung will want to see is a very flat curve, not a sampled spiky one, which makes even a sine wave look spikey. Your Zoom I suspect will be just as bad at this. You need a real sweep analyser, with adjustable timebases so you can detect the level of every frequency. Your snag is that if you record silence, you do not get a straight line. Look at what you recorded. Lots of more than 2dB spikes across the entire audio spectrum, but they are NOT there. They're just products of sampling in this way. They tend to be more accurate with very loud sounds, but at low level almost threshold of hearing levels, the actual process of 'hearing' these sounds is not really something cheap kit can do - it's just not designed for it.

The facts are you can hear a tone that others cannot, but blind testing with the item being turned on or off, proves it exists. Unless you can document it, you are wasting time and money. Sell the Samsung and spend your money on funding a replacement. It just won't end happily because you know 100% it is the TV but that is not the problem. Making Samsung swap it will take time, effort and money - and possibly the replacement would have the same issue, and they will think you are a loony! We had this years ago with TV sets. The line timebase transformers would often whistle, driving some customers mad, but in the workshop, nobody could hear it, and "the loony at number 13 is on the phone again" would be commonplace. Get shot of the Samsung and buy something different - it's the only sensible solution. You sadly have sensitive hearing, a TV that annoys you, and no way on earth of convincing a man wearing a wig in court. If you brought the Samsung into Judge Judy's court, would she hear it? That's the only thing that would matter. If she listens, screws her eyes up and then says "Bert, can you hear it?" and he shakes his head, it's the end of the road.

Sorry
 

Lasse Thomsen

New member
Apr 7, 2022
14
0
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Denmark
..........................

Sorry

Don't be sorry your telling me your opinion based on logical thinking....... and I think your pretty spot on.

I don't know why I am doing this either. This project of mine, has made no logical sense since Febuary 2022, but I am still doing it. Perhaps I want to prove to myself ................ No idea, but still going to finish it. (Written rejections from Samsung and "tænk" advisor)
Definitely going to be trash talking Samsung support on review sites afterwards, and haveing a cool video to back it up. looks good? feels good? Challenge of making a good video? Perhaps ........ I just don't know, but i'm going to make it anyways.
 

Tim McCulloch

Graduate Student
Jan 11, 2011
3,042
51
48
Wichita KS USA
Don't be sorry your telling me your opinion based on logical thinking....... and I think your pretty spot on.

I don't know why I am doing this either. This project of mine, has made no logical sense since Febuary 2022, but I am still doing it. Perhaps I want to prove to myself ................ No idea, but still going to finish it. (Written rejections from Samsung and "tænk" advisor)
Definitely going to be trash talking Samsung support on review sites afterwards, and haveing a cool video to back it up. looks good? feels good? Challenge of making a good video? Perhaps ........ I just don't know, but i'm going to make it anyways.
If it's something you can ultimately (and hopefully irrefutably) document you can at least have something to point to for your efforts. I'm not sure Samsung will be accommodating (they've been good to me on phones that bricked). How much effort you can reasonably put into it is your choice.

I'm with Paul; I think the outcome will be your selling this TV and finding a unit more conducive to peace and quiet.
 

Paul Lewendon

Member
Oct 8, 2019
49
9
8
52
British Columbia Canada
I sympathize with your situation, but you might want to re-think slamming Samsung in forums based on your unique situation, and measurements, etc., since it's based on sensitive hearing, I know it's hard not to take things personally, but the way the "keyboard warriors" get, you may not get alot of sympathy. Just a thought.
 

Lasse Thomsen

New member
Apr 7, 2022
14
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1
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.....................

Your correct this thread has gone off topic, and i apologies. Reading back I made off topic answers. I was trying to explain what I wanted to achieve audio tech wise, and ended up talking about why I wanted to do it, in the first place.
I am currently trying out some of the audio advise I have gotten. Thx for showing interest and helping.
 

Paul Lewendon

Member
Oct 8, 2019
49
9
8
52
British Columbia Canada
Your correct this thread has gone off topic, and i apologies. Reading back I made off topic answers. I was trying to explain what I wanted to achieve audio tech wise, and ended up talking about why I wanted to do it, in the first place.
I am currently trying out some of the audio advise I have gotten. Thx for showing interest and helping.
I didn't notice that here, it was relevant to your situation, but I was moreso just commenting on you mentioning
""Definitely going to be trash talking Samsung support on review sites afterwards....""
 

Lasse Thomsen

New member
Apr 7, 2022
14
0
1
39
Denmark
Hi

I am doing a little project. This project is unrelated to my posts, about a “periodical high-pitched noise”, and the noise is not a problem. I just found the idea challenging and interesting. Maybe I’ll learn something I can use later.



Project background noise

Equipment:
Standalone recorder Zoom H1n with tripod.
PC with windows 11

Setup:
I record in .wav – 48k, 24 bit.
I put my Zoom H1n in a closed cabinet on top of my TV box. See picture.

2022.05.06 Capture setup - SOS forum.jpg

Experiment:
I would like to get a feel for the background noise inside my cabinet, so I made a short recording of me turning the TV off. My TV box makes a humming sound and sometimes a very low volume squeaky high Hz noise, which I captured. (Not audible, almost)

.wav file of me turning off my TV. (It is shared via drop box, click download in left to get .wav file)
The squeaky noise stops around 13s in. It is so low I can barely hear it. (But Audacity can see it, impressed)

Wav file: “2022.05.05 TV on, squeaky high Hz noise - SOS forum”

I don’t think that there is any electromagnetic interaction in the capture. Is this correct?

Project:
To hear the very low volume squeaky high Hz noise you have turn up the volume so loud that the humming and background noise becomes overwhelming, so can’t hear the very low volume squeaky high Hz noise clearly. I thought it could be a fun little project to try and “clean” the .wav file of humming and background noise, so the very low volume squeaky high Hz noise is clearer and more prominent.

I am thinking now, after trying, this is impossible, because the background noise and squeaky noise is so close and google is not helping. Can you guys point me towards a YouTube guide / advise / direction to achieve this?

Funny thing. If I put the .wav file in Audacity I can actually see where I turn off the TV. I am impressed with the Zoom H1n and Audacity.

2022.05.06 TV on, squeaky high Hz noise  - Audacity - SOS forum.png