Xperia X, speaker phone, audio feedback

asked 2017-11-24 12:01:46 +0300

TomC gravatar image

updated 2017-11-24 12:17:46 +0300

Has anyone experienced audio feedback problems with speaker phone functionality on the Xperia X?

During a recent phone call, I activated the speaker phone and turned up the volume to get it loud enough. After a while, a pulsating feedback sound started to appear (appr. 1 Hz pulse, sound frequency guessed to be around 1 kHz). The person I talked to started to complain about this as it grew louder and louder. We dismissed the call and he called me back, but the problem started again. Normal phone function did not have the problem at all.

I have used the speaker phone before also without this problem, so I don't know what could have been different this time.

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IIRC it has been mentioned on recent community meeting that echo cancellation is not yet properly implemented (or possibly not implemented at all), which sounds like it might be the cause of this.

MartinK ( 2017-11-24 13:39:39 +0300 )edit

I also had someone on the other end of the line complain about this. I suspect this is why the maximum speakerphone volume is set low.

jb ( 2017-11-24 14:36:57 +0300 )edit

You simply wouldn't hear 1 hz, it's just not possible. 20Hz to 20kHz for our hearing range, much like that of response values to many loudspeakers (generalisation).

Have a play with this frequency generator; be sure to set low volume before playing with it;

Edz ( 2017-11-24 22:00:10 +0300 )edit

If you read more carefully, you'll notice that the estimated pitch frequency is 1 kHz. The sound appears as a pulse of appr. 1 Hz (0.5s sound, 0.5s silence).

TomC ( 2017-11-24 22:28:47 +0300 )edit

Yep, I skipped that somehow, quite right @TomC, my bad ;)

Edz ( 2017-11-24 23:46:27 +0300 )edit