[Elecraft] Use of K3 voice keyer

[Georgek5kg at aol.com]

My K3's voice keyer works great.  I use the K3 with a CM500 boom  
mic/headset.  When transmitting a recorded voice message, any slight touch,  bump, or 
noise on the mic will stop the message.  Is there a way to prevent  a noise 
or bump to the mic from stopping the message (other than not bumping or  
making a noise on the mic, of course)?
 
Also, is there a way to key the messages from an external key pad, kinda  
like the iMate is for the Icom 756Pro radios?
 
73, George
 
George  Wagner, K5KG
Sarasota, FL