Re: [Bluez-users] Periodic noise on microphone with bt_sco [Solved]

[Dirk Stockmann <dirk.stockmann@web.de>]

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Hi,

first of all I want to thank everybody for the help. I learned a lot
about bluetooth and finally got it working, so I am happy ;-).

I installed the newest hcidump and used the -A option to capture the
sound data. It already contained the noise - so it was produced by the
headset. Then I repeated the test with the mobile phone and there was
also some noise - this time.
After some test (most have looked silly) I found out that it is caused
by feedback between the RF, the speaker and the microphone. It
disappeared when I held the headset to the ear with my hand - that must
have been the case with the first test with my mobile.
I applied a small strip of self-adhesive aluminiumfoil to a specific
part of the headset, the noise is now completely gone.

Dirk

- --
Key can be found on:
http://sks.keyserver.penguin.de
hkp://sks.keyserver.penguin.de
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