Sound of inductors?

Thomas · 29th October 2005, 08:25 PM

During the calibration process in justmls, I played arround with diferent components verifying the calibration.

Sudenly! What's that? Do I hear a sound from somewhere? Every time I press 'meassure' I hear the noise. I realized it came from the inductor placed on top of my old denon amp I use for these meassurements. The amp chassis somehow amplified the noise. Hmm...

I tried diferent inductors and the noisiest was the 'traditional' 1.2mm2 air-core inductors. The most quiet I could find was a copper foil inductor.

No sound from capacitors though.

Audiophilenoob · 30th October 2005, 04:31 AM

I don't know what to say to this thread

sr20dem0n · 30th October 2005, 04:44 AM

Maybe it's the inductor's magnetic field vibrating the metal casing on the amp it was resting on. The foil inductor might have been less severe due to a smaller stray magnetic field.

Just a guess

Audiophilenoob · 30th October 2005, 06:23 AM

Quote:

Originally posted by sr20dem0n
Maybe it's the inductor's magnetic field vibrating the metal casing on the amp it was resting on. The foil inductor might have been less severe due to a smaller stray magnetic field.

Just a guess

when you saturate a transformer it will play music... very very distorted music...

probably wants happening here

wintermute · 30th October 2005, 07:26 AM

yes I have experienced this with a cheap stock crossover in the past. you could actually here the instruments and make out the lyrics (admittedly it sounded very tinny) even without it sitting on anything but the carpet!

If i hoolked it up to the amp and didn't connect any speakers to it, it was most apparent! required a reasonable amount of power to start it off, but it was an interesting observation to say the least!!

Tony.
Tony.

Thomas · 31st October 2005, 09:08 PM

Quote:

Originally posted by Audiophilenoob
I don't know what to say to this thread

How do you think I feel?

keyser · 31st October 2005, 10:07 PM

I hope the musical coil was a joke?

large transformers in amps can make a buzzing sound. Here in europe it is 'round 50 hz. I too think it has to do something with the changing magnetic field: moving towards and away from the metal case...

wintermute · 31st October 2005, 11:07 PM

Quote:

Originally posted by keyser
I hope the musical coil was a joke?

I am absolutely dead serious!!!! I suspect I was saturating the coils, they were air cored on plastic bobins. I think the crossover was only rated at 60W and I may have been feeding in a bit more power than that

Tony.

soongsc · 31st October 2005, 11:34 PM

Quote:

Originally posted by wintermute

I am absolutely dead serious!!!! I suspect I was saturating the coils, they were air cored on plastic bobins. I think the crossover was only rated at 60W and I may have been feeding in a bit more power than that

Tony.

Air core on plasic bobins can ssturate? Is the conductor size the limiting factor?

soongsc · 31st October 2005, 11:36 PM

Quote:

Originally posted by Thomas

...
I tried diferent inductors and the noisiest was the 'traditional' 1.2mm2 air-core inductors. The most quiet I could find was a copper foil inductor.

No sound from capacitors though.

Are these inductors in the speaker or are they amp output inductors?

29th October 2005, 08:25 PM	#1
Thomas diyAudio Member Join Date: May 2001 Location: Right here	Sound of inductors? During the calibration process in justmls, I played arround with diferent components verifying the calibration. Sudenly! What's that? Do I hear a sound from somewhere? Every time I press 'meassure' I hear the noise. I realized it came from the inductor placed on top of my old denon amp I use for these meassurements. The amp chassis somehow amplified the noise. Hmm... I tried diferent inductors and the noisiest was the 'traditional' 1.2mm2 air-core inductors. The most quiet I could find was a copper foil inductor. No sound from capacitors though.

30th October 2005, 07:26 AM	#5
wintermute just another diyAudio Moderator Join Date: Aug 2003 Location: Sydney Blog Entries: 22	yes I have experienced this with a cheap stock crossover in the past. you could actually here the instruments and make out the lyrics (admittedly it sounded very tinny) even without it sitting on anything but the carpet! If i hoolked it up to the amp and didn't connect any speakers to it, it was most apparent! required a reasonable amount of power to start it off, but it was an interesting observation to say the least!! Tony. Tony. __________________ Any intelligence I may appear to have is purely artificial! Some of my photos

31st October 2005, 10:07 PM	#7
keyser diyAudio Member Join Date: Oct 2004 Location: The Netherlands	I hope the musical coil was a joke? large transformers in amps can make a buzzing sound. Here in europe it is 'round 50 hz. I too think it has to do something with the changing magnetic field: moving towards and away from the metal case... __________________ "Convictions are more dangerous enemies of truth than lies" - Friedrich Nietzsche Cardioid-like + Waveguide 2-way

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30th October 2005, 04:31 AM	#2
Audiophilenoob diyAudio Member Join Date: May 2005 Location: NC	I don't know what to say to this thread

30th October 2005, 04:44 AM	#3
sr20dem0n diyAudio Member Join Date: Apr 2005 Location: Broomfield, CO	Maybe it's the inductor's magnetic field vibrating the metal casing on the amp it was resting on. The foil inductor might have been less severe due to a smaller stray magnetic field. Just a guess

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