Has anyone modified Sennheiser HMD26 headset to auto mute when the mic boom arm is lifted?

[stephenb]

Has anyone modified a Sennheiser HMD26 headset to auto mute the microphone when the mic boom arm is lifted? A client was offered this pre-installed by Sennheiser but it can't source the required circuit board anymore. Any suggestions and/or previous experience appreciated. Thanks

[ao]

the feature is mentioned in this advert.  perhaps there is an online manual that mentions the part number of the circuit:

 

http://en-ca.sennheiser.com/closed-headset-tv-radio-broadcast-hme-26

[pindrop]

Sennheiser say this which may help?

 

'The HMD 26-II headset has many upgrades including a redesigned boom arm, an auto-mute boom function (shipped disabled)'

 

but if you can find the instructions to enable auto-mute you're a better downloader (not in the manual I downloaded) or Googler than me...:)