audio examples
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Joined: Apr 2004
Posts: 77
old hand
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OP
old hand
Joined: Apr 2004
Posts: 77 |
Can anyone give an example of something that gives off a sound in, say the 15-20 kHz? What about something in the 40-20 Hz? How high is that buzz I always hear from my t.v. set?
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Re: audio examples
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Joined: Nov 2003
Posts: 81
old hand
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old hand
Joined: Nov 2003
Posts: 81 |
Here is a 3 sec tone sweep between 15 and 20hz.
Here is a 3 sec tone sweep between 20 and 40hz.
No clue on the frequency of the noise emmited by TVs, but its probably pretty high. (10-15khz maybe?)
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Re: audio examples
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Joined: Sep 2002
Posts: 1,488
connoisseur
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connoisseur
Joined: Sep 2002
Posts: 1,488 |
id think the noise you hear from the tv is in the 15-20k range.
Its caused by the flyback transformer, and the 10,000+ volts in there
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Re: audio examples
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Joined: Apr 2004
Posts: 77
old hand
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OP
old hand
Joined: Apr 2004
Posts: 77 |
Coolio. Thanks for the link.
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Re: audio examples
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Joined: Dec 2003
Posts: 3,602
connoisseur
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connoisseur
Joined: Dec 2003
Posts: 3,602 |
And if you ever want to recreate the "big bang" - cross a screwdriver between the anode and the aquadag on one of these.
Bren R.
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Re: audio examples
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Joined: Nov 2003
Posts: 81
old hand
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old hand
Joined: Nov 2003
Posts: 81 |
I messed with the tone generator a bit and it does sound like the TV hiss noise is probably in the 15-20khz range. Here is what a 15 to 20khz sweep sounds like.
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Re: audio examples
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
Joined: Apr 2003
Posts: 16,441 |
Ouch! I shoulda turned down my speakers first.
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Re: audio examples
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Joined: Jan 2002
Posts: 3,270
connoisseur
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connoisseur
Joined: Jan 2002
Posts: 3,270 |
Hi,
Yep, the flyback transformer. I think it's 16 kHz if memory serves. That must be one very old TV. Is it? Is it an all-tube B & W (black and white)?
Regards
Alan Lofft, Axiom Resident Expert (Retired)
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Re: audio examples
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Joined: Apr 2003
Posts: 5,236
axiomite
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axiomite
Joined: Apr 2003
Posts: 5,236 |
I can alway hear my TV when it's on...it's actually similar to a very low tone...it's almost like you can feel it more than hear it.
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