Using built-in Telex mic?

Here you go. I would use something like this. This has a 1.75" (44mm) diameter. http://www.bhphotovideo.com/c/product/298898-REG/WindTech_MC_4_MC4_Extra_Large_Heavy_Duty_Microphone.html
You can also go here http://www.crossroadsaudio.com/Rentals%20Catalog.pdf scroll down to page 5 and you can use this - $15.00 Telex ELM-22S Black Lapel Mic, Shure TA4F w/ Mic Clip -- That clip is the same diameter as your mic and is made by Telex.

Contact Bosch/EV (formerly Telex) via website or call them. They're in Burnsville Minnesota and their customer service is excellent.

Try reinstalling the sound driver and also check the volume for the mic.

your computer has a built monaural microphone. check your sound settings to make sure the mic is on. if the mic is on and there still isn't any sound on the other end then you might try an external mic. they work better as far as quality anyway.

have u only used messenger to test your mic? try other applications like a voice recorder, and see if yer mic will pick up there. if it does, then mabey u have the wrong version of messenger like if u have 32 bit or 64 bit version of windows. if it doesnt work, then you have a driver error and u can go into start>control panel>device manager>and other computers are different, but i'd go into imaging devices cuz my cam and mic are a full set of drivers together but see if you have a microphone on there. if not, then look at wot u can see that has any possible relation to a microphone, and select "update driver software" and it'll go online for ya and see if the drivers are up to date. and if its not the driver, then its your mic itself, and hopefully your under warranty, or if not, then just pay some money and get it fixed.

You say the person at the other end so I assume you are using a messaging client (MSN, Yahoo, Skype etc). Check the audio set up in the client (it allows you to select the mic you want to use and test it).

On MSN Messenger this is Tools, Audio and Video setup

pretty sure that camera has no microphone

How do I set the squelch on a TELEX FMR-70 receiver?

may be mic preamp is not working correctely. condenser microphone voltage is very low or mic is fault . check your microphone cable . preamplifer of condenser mic may be leaking .check ur mic driver and audio .

Troubleshooting - Can't get voice chat to work.
Here are a few things you should know and check for to get the voice chat to work. · Firewalls - the voice chat feature may not work well behind company firewalls. Even though you can get other features of Yahoo! Messenger to work, the voice chat feature uses separate technology and may not work as well.
· Check connection - When you enter into a voice chat with friends, each participant should take turns trying to press and hold down the Press to Talk button. Everyone else should see their name turn red when they do that. If you see their names turn red, but don't hear anything, it may be a microphone / speaker problem, or it may be that we have more bugs that we need to fix. If you don't see their name turn red, you are probably having connection problems and that's why it's not working.
· Get the latest version - Please make sure that everyone who is using the voice chat feature has the latest version.
· Check mic and speakers - Check that your microphone works and that your speakers are turned on. Here's how:
* make sure the mic is plugged in correctly.
* adjust the mic properties.
- go to the control panel (start button -- settings -- control panel)
- click on the multimedia icon
- you should see a tab for audio
- make sure that the recording volume is set high.
* you can test your mic. by doing the following.
- Click the Windows Start button, then go to Programs, then Accessories, then Multimedia, then click on Sound Recorder
- A new window called Sound Recorder will pop up. Click on the record button (a red circle), then say a few words, then click the stop button (black square).
- Click the play button (black triangle).
If you can hear yourself fine, then your microphone is okay. If you can't hear your voice using Sound Recorder, the voice chat should not work either.