Unwanted noise coming out of my IBM x60s laptop speaker
I just replaced my x60s motherboard and everything works well except an unwanted sound coming out of the speaker. though it stops when i temporarily mute the microphone, as this is not normal, i will need the microphone. Any permanent solution?
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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.
There are a lot of audio processing programmes available on the internet some free and some demonstration and others needing paying for. I have only used one - Goldwave is very stable and offers a lot of functions and options.
Using an omni-directional microphone in a noisy environment is very unwise unless the noise is wanted. It is easier to keep unwanted noise out than to get rid of it later.
I believe an audio laboratory could get rid of much of the unwanted noise by displaying the sound visually and removing unwanted noise and enhancing the wanted noise but it is a long and expensive process requiring much experience and specialist equipment.
For ordinary mortals the only practical answer is using filters, such as a graphic equaliser to lower the relative volume of the main frequencies of the unwanted noise while boosting the volume of the wanted frequencies.
While this works and achieves the objective the resulting audio is likely to be rather flat and expressionless...
If on battery power:
Some laptops make little "squicky" noises sometimes. This is normal for some laptops.
Try re-installing the software for your soundcard using the dell support site: http://support.dell.com/
If on grid power:Please check that you are connected to a grounded outlet. Next you should check if there are no machines like washing machines, microwaves or vacuum cleaners on the same connector box as your laptop is. Those devices can create some disturbance.
Try removing all cables going to the TV except the power cord. Power on the TV and press mute. If you have any unwanted noise, then you have a defective TV and since it is new, you should get an exchange. If there is no noise with the A/V cables removed, then you might have hooked the source (cable box/DVD Player) into the wrong inputs of the TV.