Disabling Software Noise Cancellation

I recently purchased the Plantronics 925 bluetooth headset; it's a great little headset, but unfortunately it does not work correctly with OS X. As documented in [this thread|http://discussions.apple.com/thread.jspa?threadID=1723787] the microphone of the device does not work correctly with OS X Leopard.
Now, as Conor Keenan [surmises in his post|http://discussions.apple.com/message.jspa?messageID=8065212#8065212] it would appear that the OS X built-in noise cancellation is the culprit here. From my own observations I'm inclined to agree, but this does not help, hence why I am posting.
So, what I'm hoping for is either:
* A way to switch noise cancellation off, this option appears to have existed in OS X.4 Tiger so may still exist somewhere.
* A way to get in touch with an Apple engineer who may be able to help, as it is seems a very simple feature to request for the gain it gives in headset compatibility.
Any help is appreciated!

If you want to report this to Apple, send bug reports and enhancement requests to it via its Bug Reporter system. To do this, join the Apple Developer Connection (ADC)—it's free and available for all Mac users and gets you a look at some development software. Since you already have an Apple username/ID, use that. Once a member, go to Apple BugReporter and file your bug report/enhancement request. The nice thing with this procedure over submitting feedback is that you get a response and a follow-up number; thus, starting a dialog with engineering.

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    Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.
    If this is only happening when you have a specific accessory attached, please try this: Main Menu > Settings > Apps > Smartconnect > Clear Data.
    What are your thoughts about this forum? Let us know by doing this short survey.
     - Official Sony Xperia Support Staff
    If you're new to our forums make sure that you have read our Discussion guidelines.
    If you want to get in touch with the local support team for your country please visit our contact page.

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