Question about IBM ThinkPad T22 2647 Notebook

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Microphone Feedback When you put your hand over the Microphone, one gets a "feedback" sound, even when the "volume" control is turned off.

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Turn the volume down, even if it's off.
The laptop picks up on anything near it, not necessarily audible sound.

Posted on Dec 19, 2007


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How to increase volume on corded speaker phone

Are we talking about an old style phone that you plug into a wall jack. In that case you can only increase the volume as high as the volume control will let you. Going higher may introduce significate feed back (high pitched whine).
If it's the microphone volume you want to increase (sound volume for the other party), that's not possible with out a major hack.
The phone needs to control the speaker volume and the microphone volume, and balance the two so you don't get feedback, yet allow each party to hear the other. This only works within a fixed range, which, if you exceed, will over load the circuit and you will get feedback. You may want to try a different phone, which may have a higher volume.

Sep 06, 2017 | Cell Phones

1 Answer

Logitech speaker feedback

Feedback is a sharp, loud noise that can come through the earphones of a headset unexpectedly---it occurs when the headset is getting sound (feed) from someone else speaking or playing music into a microphone. This sound can create a dangerous situation for someone who is operating expensive equipment or flying a plane at the time since it can disable hearing temporarily.
If you experience feedback often, it could also lead to serious hearing problems.

Mic Too Close to the Speaker or Volume Too High
The main cause of a feedback sound in a headset is proximity to a speaker. If a person holding a microphone on the other end gets too close to a speaker, it creates a loop of re-amplified sound that results in the loud, screeching noise. When the volume on the other party's microphone is too high, it is more vulnerable to picking up unwanted noise and feedback from speakers and sound output devices in the room. So make sure that you ask the other party to turn down the microphone to a normal level and stay far from speakers. b> Two Microphones Gathering Same Sound b> When the other party places two microphones too close to each other, it could cause feedback. When positioned toward the sound source (such as a person speaking) the microphones will both pick up the same audio and compete with each other when creating the output of sound, causing a sharp noise in your headset. This problem, called acoustic phase interference, is resolved by simply ensuring that the other party uses one microphone at a time. Poor-Quality Headset or Microphone b> One common cause of feedback is simply a poor-quality headset or microphone. Most modern headsets and microphones have noise-canceling features that manage and kill feedback before it has a chance to occur. These noise-canceling headsets are essential for pilots and aviation crew members. If you hear sudden feedback that is strong enough to hurt your ears, the headset or microphone is simply not properly equipped to actively cancel that unwanted noise before it hits your ears. Buy a higher-quality noise-canceling headset to manage the feedback noise when you're going about your tasks. Hope this helps.

Dec 23, 2012 | Logitech Z623 Speaker System

1 Answer

How do i get rid of feedbacks when i use my E6i Earset, am raning it through an AKG PT2000

Feedback is caused when a microphone's volume is returned out of the speakers, and then picked up again by the microphone causing a loop. The sound is amplified, picked up by the mic ,and then reamplified causing the feedback.
The first step is to make sure you are an adequate distance from the speakers. Also make sure the speakers are not behind you, but in front of you again allowing more distance and keeping the feedback down.
The most logical thing is turn the mic down to a lower level. Countrymans are very sensitive so adjusting the volume in small amounts will work too.
If all else fails, you may need to add an equalizer to your system if you do not have one. This will allow you to adjust out the frequencies that ring the most. The more sliders on an equalizer, the more adjustment you have. If you do have one already ,start from flat (all sliders straight across in the middle) and gradually inch up each slider individually until you hear the feedback ringing in the frequency it did before. You then slide the slider down below the middle to give you more volume before feedback. Don't go crazy here, and adjust only a few sliders down as needed. You will start losing overall volume in your sound system if too many are adjusted down.
Good Luck

Feb 21, 2011 | Countryman E6i EARSET f/XWIRE (TAN)...

1 Answer

My Mic is on all the time it is also coming through the speakers so when i turn external speakers on there is an huge feedback

See Adjust volume below

To use any microphone with your computer you will need to enable it in control panel. Instructions are for Windows XP but are similar for Vista and Win7



In Sounds & Audio Devices Properties window locate SOUND PLAYBACK box. Click VOLUME button. Make sure that there is not a check-mark in the MUTE box against microphone in the list of devices and the volume slider is at the top of the scale.

Ensure the MUTE ALL box isn't checked before closing window.

Click VOLUME button in SOUND RECORDING BOX. Here SELECT microphone as an input source for recording (as opposed to un-checking mute in the playback controls).

NOTE if microphone is not listed in the 2 sets of volume controls click OPTIONS, PROPERTIES on the tool-bar and place a check against microphone in the list entitled 'show the following volume controls' and then click OK. The same applies to 'Internal MIC' if you are using a laptop with built in microphone - this must be enabled/ disabled separately to the external MIC.

To adjust audio volume.

Under VOLUME tab adjust Device Volume as necessary. Also (under Loudpeaker Settings) click Speaker Volume and adjust slider to suit.

You can also put a check mark in the box to show the volume control icon on the Task Bar so you can go straight to it to in future

Feb 10, 2011 | Toshiba (P000257700) Microphone

1 Answer

The mic is on because I hear feedback, like a high pitched shrill when I turn the volume of the computer up... even when there's no music playing. How should I take care of this problem?

in the bottom right hand corner, there should be an icon that looks like a speaker. left click it and display the "mixer" style control panel. When opened there should be a series of faders (sliders) with titles either above or below each fader. Click on the box that says "mute". Your microphone should now be muted and the feedback problem cured. Don't forget to unmute the mic again if you use it.

Jan 16, 2011 | Toshiba Audio Players & Recorders

1 Answer

When i put my hand over the mircophone it makes a sqeeking noise and when i try use adcuity to do my lrics it says error check input

1. The sound that you are hearing when you put your hand over the microphone is just feedback. Try adjusting the microphone input volume down a little and this should help reduce or eliminate this feedback sound. The reason that it happens is because by putting your hand over the microphone, you arr changing the characteristics of the mic's picup as toyr hand helps with reverberation and echo, both of which increase the chance of feedback.
2. I am afraid i don't know the software called adcuity. Please could you let me know the software author and which version it is and i will try to help.

Mar 18, 2010 | Toshiba Satellite A100-S8111TD Notebook

1 Answer

My voice keeps echoing and playing back at me

Does the laptop have a built-in microphone? Make sure the microphone output is turned off (muted) in the playback volume settings. It could be at just the right setting to be causing a decaying feedback. Also, many sound softwares today have other features for echo, reverb, etc. My Creative one has a vast selection of simulated reverb like Concert Hall, Bathroom, Basement, Cathedral, even one call Haunted Cavern. Look for these in the advanced options section of your sound controls. These normally aren't a part of the standard windows volume control. There should be a shortcut similar to Sound Mixer to access them, if you have it.

Jul 19, 2009 | Acer Aspire One AOA150-1784 Netbook

5 Answers

My headphones are feedbacking all of a sudden

The design of these headphones includes a microphone on the outside and on the inside of each earcup. The outside microphone detects outside noise. The inside microphone monitors what you are hearing and when it detects that the outside noise is present inside, the active noise-canceling circuits remove that noise. This happens fast enough that you perceive a siginficant reduction in the outside noise getting to your ears.

The airspace inside the earcup is a tuned chamber defined by the foam in the ear cushion. This is important because with the inside microphone in close proximity, but at a 90-degree angle to the speaker, the circuit must be designed to eliminate the normal feedback that occurs.

If the foam in the ear cushion has weakened/deteriorated to the point that it no longer has it's original shape, (in particular the lower half of the ear cushion), the size and shape of the air chamber inside of the earcup is directing more of the speaker sound toward the microphone than the design can compensate for causing audio feedback to occur. You are hearing that feedback.

On my QC-3 headphones, I can cause the feedback squeal in both earcups, with the left earcup being more sensitive to the shape change than the right.

It may be time to replace the ear cushions. If so, they are available from Bose for around $35/pair.

Mar 24, 2008 | Bose QuietComfort 3 Acoustic Noise...

1 Answer

Feedback sound, hissing , in speakers logitech X-540

You may want to try disabling/muting the microphone volume in the volume control. If it doesn't help please post back.

Feb 19, 2008 | Logitech X-540 Computer Speakers

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