From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <4371B708.2050001@web.de> From: Dirk Stockmann MIME-Version: 1.0 To: bluez-users@lists.sourceforge.net Subject: Re: [Bluez-users] Periodic noise on microphone with bt_sco [Solved] References: <436F1C3B.5020002@web.de> <436F4D85.4030404@csr.com> <436F5602.1040105@web.de> <436F5B5C.7070506@csr.com> <436F608D.4020407@web.de> <436F6FEA.4030207@csr.com> <1131376874.5824.127.camel@blade> In-Reply-To: <1131376874.5824.127.camel@blade> Content-Type: text/plain; charset=ISO-8859-1 Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net Reply-To: bluez-users@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ users List-Post: List-Help: List-Subscribe: , List-Archive: Date: Wed, 09 Nov 2005 09:44:56 +0100 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDcbcHLi2VR2b1/voRAvu4AJ4jiOUWxDdmbdRhy9+yYg/9s+btfwCgzJHh n1xu77CYpfBcBHPdDyC2SwE= =Pg/A -----END PGP SIGNATURE----- ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users