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Junior Varsity
High pich sound capture / analyze
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<blockquote data-quote="Lasse Thomsen" data-source="post: 216583" data-attributes="member: 15506"><p>Hi</p><p></p><p>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.</p><p></p><p></p><p></p><p style="text-align: center"><span style="font-size: 22px">Project background noise</span></p><p></p><p><strong>Equipment:</strong></p><p>Standalone recorder Zoom H1n with tripod.</p><p>PC with windows 11</p><p></p><p><strong>Setup:</strong></p><p>I record in .wav – 48k, 24 bit.</p><p>I put my Zoom H1n in a closed cabinet on top of my TV box. See picture.</p><p></p><p>[ATTACH=full]209587[/ATTACH]</p><p></p><p><strong>Experiment:</strong></p><p>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)</p><p></p><p>.wav file of me turning off my TV. (It is shared via drop box, click download in left to get .wav file)</p><p>The squeaky noise stops around 13s in. It is so low I can barely hear it. (But Audacity can see it, impressed)</p><p></p><p><a href="https://www.dropbox.com/s/9qdjrnx4srnmgpu/2022.05.05%20TV%20on%2C%20squeaky%20high%20Hz%20noise%20%20-%20SOS%20forum.wav?dl=0" target="_blank">Wav file: “2022.05.05 TV on, squeaky high Hz noise - SOS forum”</a></p><p></p><p>I don’t think that there is any electromagnetic interaction in the capture. Is this correct?</p><p></p><p><strong>Project:</strong></p><p>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.</p><p></p><p>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?</p><p></p><p><em>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.</em></p><p><em></em></p><p><em>[ATTACH=full]209586[/ATTACH]</em></p></blockquote><p></p>
[QUOTE="Lasse Thomsen, post: 216583, member: 15506"] 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. [CENTER][SIZE=6]Project background noise[/SIZE][/CENTER] [B]Equipment:[/B] Standalone recorder Zoom H1n with tripod. PC with windows 11 [B]Setup:[/B] I record in .wav – 48k, 24 bit. I put my Zoom H1n in a closed cabinet on top of my TV box. See picture. [ATTACH type="full" alt="2022.05.06 Capture setup - SOS forum.jpg"]209587[/ATTACH] [B]Experiment:[/B] 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) [URL='https://www.dropbox.com/s/9qdjrnx4srnmgpu/2022.05.05%20TV%20on%2C%20squeaky%20high%20Hz%20noise%20%20-%20SOS%20forum.wav?dl=0']Wav file: “2022.05.05 TV on, squeaky high Hz noise - SOS forum”[/URL] I don’t think that there is any electromagnetic interaction in the capture. Is this correct? [B]Project:[/B] 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? [I]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. [ATTACH type="full" alt="2022.05.06 TV on, squeaky high Hz noise - Audacity - SOS forum.png"]209586[/ATTACH][/I] [/QUOTE]
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