cellphones as room bugs

[Daniel F. Fisher]

Ian Farquhar (ifarquha) wrote> The other problem for this technique is 
battery life.

Suppose this worked by recording from mic to memory and then 
transmitting later. This leads to a bunch of questions:

By what factor could transmission time/power be reduced sending such a 
recording later? How many minutes could a typical phone buffer? How much 
does a typical conversation compress? Are such algorithms within the 
power of a typical phone's processor? How much power is used in 
recording to memory and compressing? Can transmission power requirements 
be reduced by transmitting when transmission power requirements are low? 
Can they be reduced often enough to make it worthwhile optimizing in 
this way?

-Dan

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