Question about IBM ThinkPad T30 2366 Notebook

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Buzzing/humming sound when mic is inserted while on AC power

I love to records sounds but my problem is that unwanted noise(buzzing/humming) sounded when I connect the microphone to the port while on AC power. Please help.

Thank you

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  • JohLo May 27, 2008

    shaggryrat, thanks!



  • Anonymous Jan 06, 2009

    with a dell 1520 and Zalman microphone

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If its not usb mic you will have the humming
if it is a usb mic the port that you connected to needs a mic to be further away from comp your picking up a static charge from comp to mic

Posted on May 26, 2008

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Posted on Jan 02, 2017

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Sound noise feedback during recording


Noise can be a big problem when trying to record into a computer. Reducing and canceling out noise using several simple techniques will help increase recording quality and increase your satisfaction with recordings. Solutions range from complete room overhauls to simple changes in the placement of the microphone and other objects in the recording.


Use a stabilized microphone to reduce vibrations. Many hand-held or headset microphones will pick up on vibrations and movements from the user. These vibrations can carry over into the recording and reduce the quality of the recording. Using a microphone stand or stationary microphone will reduce noise while recording. Mic stands will help increase recording quality and off a possible solution that requires very little financial investment. Set up a designated sound room that is set away from the rest of your home. The farther the recording area is from windows and doorways, the better. Windows allow very small amounts of noise to filter in from the outdoors and create white noise in the recording. Hang blankets on the walls around the recording station and use many rough objects in the recording room. Sound travels in waves that bounce back and forth between smooth objects. Blankets and other rough objects will help reduce sound vibrations. These additions to the recording room will reduce ambient sounds from both the room and outside the building by blocking sound waves from bouncing back and forth in the room. If you can make a considerable investment in the room, there are several acoustic products on the market than help nearly eliminate echoes and outside noises. Install software that filters out unwanted sounds and echoes. Many computer applications exist that use programs to increase the quality of recordings and reduce the ambient noise levels in a recording room. Software is used to reduce echoes and feedback in a recording studio. Several free applications can be used to achieve the desired effects when recording. A program called Audacity is one of the most effective software packages that can help reduce noise in recordings. http://audacity.sourceforge.net/ Software can also be used to reduce electronic humming and other white noise that can be picked up during a recoding session. Buy a high-quality microphone with noise and echo cancellation. One of the best investments that a recording specialist can make is a high-quality mic. The microphone itself can reduce many unwanted noises and echoes in the recording room by filtering the actual sounds that are recorded.


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Jan 15, 2013 | Computers & Internet

1 Answer

Sound noise feeback during recording


Noise can be a big problem when trying to record into a computer. Reducing and canceling out noise using several simple techniques will help increase recording quality and increase your satisfaction with recordings. Solutions range from complete room overhauls to simple changes in the placement of the microphone and other objects in the recording.


Use a stabilized microphone to reduce vibrations. Many hand-held or headset microphones will pick up on vibrations and movements from the user. These vibrations can carry over into the recording and reduce the quality of the recording. Using a microphone stand or stationary microphone will reduce noise while recording. Mic stands will help increase recording quality and off a possible solution that requires very little financial investment. Set up a designated sound room that is set away from the rest of your home. The farther the recording area is from windows and doorways, the better. Windows allow very small amounts of noise to filter in from the outdoors and create white noise in the recording. Hang blankets on the walls around the recording station and use many rough objects in the recording room. Sound travels in waves that bounce back and forth between smooth objects. Blankets and other rough objects will help reduce sound vibrations. These additions to the recording room will reduce ambient sounds from both the room and outside the building by blocking sound waves from bouncing back and forth in the room. If you can make a considerable investment in the room, there are several acoustic products on the market than help nearly eliminate echoes and outside noises. Install software that filters out unwanted sounds and echoes. Many computer applications exist that use programs to increase the quality of recordings and reduce the ambient noise levels in a recording room. Software is used to reduce echoes and feedback in a recording studio. Several free applications can be used to achieve the desired effects when recording. A program called Audacity is one of the most effective software packages that can help reduce noise in recordings. http://audacity.sourceforge.net/ Software can also be used to reduce electronic humming and other white noise that can be picked up during a recoding session. Buy a high-quality microphone with noise and echo cancellation. One of the best investments that a recording specialist can make is a high-quality mic. The microphone itself can reduce many unwanted noises and echoes in the recording room by filtering the actual sounds that are recorded.


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Jan 15, 2013 | Logitech Webcam

1 Answer

I have bought an optical fibre cable to connect from my jamo a305 to my new sony nx810 tv and im getting a buzzing sound, there are 2 optical fibre outputs on the back of the amp, which one do i connect it...


Have you looked at the manuals?

http://www.retrevo.com/search?q=sony+nx810

A TV won't run external speakers directly. Besides, the TV-related audio should originate at, say, the cable Box, and go straight to your (presumed) AV receiver for the best possible decoding and reproduction.


Buzzing is an analog phenomenon and is NOT carried by optical cable in any case.

Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversible, try that. Sometimes the buzz is from an attached device. Make sure all audio cables are plugged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's. I've also seen variable track lights induce noise but it's usually minor.

Try rotating the power cord in the wall outlet.

If it still buzzes with no cables or anything external attached there's an internal problem.

Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.

Reverse the cables Left to Right to see if it stays with the cable or the input channel. Follow it back to the source, isolating in the same manner. Eventually you will find the entrance point of the hum. Frequently a cable's ground will oxidize over time and simply removing and reattaching the cable with a twisting motion will re-establish the shield.

May 02, 2011 | Jamo A 305 Main / Stereo Speaker

1 Answer

Buzzing sound when sub is on even without turning my amp on, if you can call me on my phone 909 938 9219 it be better for me thanks, i am little slow with my computer, please help


Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversible, try that. Sometimes the buzz is from an attached device. Make sure all audio cables are plugged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's.

Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights.
I've also seen variable track lights induce noise but it's usually minor.

Try rotating the power cord in the wall outlet.

If it still buzzes with no cables or anything external attached there's an internal problem.

Apr 30, 2011 | KEF Audio PSW 2150 Speaker

1 Answer

Sometimes my AKG Perception 420 won't record properly, when played back it sounds like white noise with the faintest sound of what i'm trying to record in the background


All microphones have a signal to noise ratio. Basically defined as the level of desired sound to background noise (unwanted sound). Microphone phones also have self noise which should be considered when choosing a mic. There will be noise in every mic, some more audible than others. Condenser microphones require phantom power (48V). This can be supplied by mic prea
mps, mixers, and similar equipment. *Note that phantom power (mic pre amps) must be on or engaged, this can be specific to different types of equipment.
Troubleshooting:Has your microphone been dropped or exposed to moisture? Internal damage to your microphone will be hard to assess but this could possibly be the issue. Inspect the microphone cable, check for damages. Try using a another microphone cable-- preferably a new one. Next to check would be your mic's power supply. Make sure all connections are made properly (mic to cable to power supply). If you are using a mixer or pre amp with multiple inputs, test the mic on each input. (You should test by making recordings and comparing with each change to isolate possible causes). Also test the mixer or pre amp by slowly sweeping the input gain feature while recording an audible source such as singing into the microphone. Typically next in the audio recording chain would be your DAW (digital audio workstation) or computer, but problems with noise most likely precede this.
I could possibly provide more useful information if I know your exact setup.
Provided that you have your equipment setup properly, the microphone or mixer/preamp could possibly be damaged/malfunctioning. I suggest taking your equipment to a trusted repair shop, or if still under warranty, returning to the manufacturer for repairs or replacement.
Hope this helps

Apr 05, 2011 | AKG Perception 420 Microphone

1 Answer

I recently connected my satellite reciever to my


Iassume you mean you hear the buzz independently of the audio program - simply connecting the cable causes the buzz?

If tanything in the mix is powered from different AC sources you may have a different ground potential. Sometimes manipulating the orientation of one or more ac plugs will solve hum problems.

Apr 02, 2010 | M&K Sound Mp Series MX-350 MK II THX...

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Buzzin on my web cam mic


check all your grounds. Is the computer outlet have a proper ground? Sometimes if your using a sound card make sure its grounded to case of computer.Make sure cable that feeds mic is not laying over a 110v cord as that can pick up a 60Hz buzz or hum noise as well. Hope this helped sometimes its trial and try again....

Jul 22, 2009 | Electro-Harmonix EH-TM Microphone

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Microsoft webcam VX 6000. Buzz on video capture


I took the cam apart, removed the mic from its seat and gently separated the red and black wires - ran the red one over top the lens and the black one underneath. Replaced the mic, screwed it all back together and the problem is gone. For now. One tip is to record sound using Windows Sound Recorder while you're doing this, watch the input line and when it goes flat you know the buzz is gone. While it buzzez, the line will be active.

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New noise


sounds like a ground issue to me. that sounds like either 60 cycle hum, or a loose or broken ground. You can probably do an ohmmeter check, first, with no power, and see if you have continuity. That's not unusual for mikes of the seniority of your equipment.

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1 Answer

Humming noise while recording


bad mic assy was the unit dropped ? possible bad ribbon cable or unit stored with battery still attached to unit.

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