[maemo-users] Bluetooth headphones and mp3's

From: Simon Pickering S.G.Pickering at bath.ac.uk
Date: Wed Sep 26 12:24:36 EEST 2007
>> Another Cons: Bluetooth fries the brain, its very very harmful for the
>> health... And needs more energy than wi-fi that means less stand-by time..
> Conjecture on the frying of brains.  Largely as reliable as the word organic
> on the side of something I buy in the store.  (Define Organic.  Carbon based.
> All food consumable by humans is carbon based.)

I thought Bluetooth was significantly lower power than Wifi...?

> On the second.  Yes when I'm using the n800 it does last less time than when
> I'm not using it.  (bluetooth VS standby.)  However WiFi phones don't exist.

When using Bluetooth one would expect the battery life to be reduced to 
some extent, add to this the fact that the CPU load is reasonably high 
as it is re-encoding PCM data (decoded from MP3 on the DSP) to SBC so 
it can be transmitted to and understood by the Bluetooth headset.

The question is whether it's the Bluetooth transmitter or the CPU load 
which is causing the majority of the power drain?

I don't think a Wifi phone would be much better - I'd guess that the 
power consumption of the Bluetooth transmitter is lower than the Wifi 


More information about the maemo-users mailing list