Cochlea a protein motor called prestin on their outer membranes; it generates additional movement that couples back to the fluid–membrane wave. This "active amplifier" is essential in the ear's ability to amplify weak sounds. The active amplifier also leads to the phenomenon of soundwave vibrations being emitted from the cochlea back into the ear canal through the middle ear (otoacoustic emissions). Otoacoustic emissions are due to a wave exiting the cochlea via the oval window, and propagating back through the middle ear to the eardrum, and out the ear canal, where it can be picked up by a microphone. Otoacoustic emissions
Jock Stirrup security co-ordinator and during one of his visits to Iraq, Stirrup met the new Basra security coordinator, General Mohan. Mohan wanted the British forces to withdraw from Basra and Stirrup stressed that once British forces had departed, Mohan's Iraqi forces would have to deal with security. Both Mohan and Stirrup were clear that retaining British forces outside Basra would be an insurance policy against a deteriorating situation within Basra as well as give Mohan something additional with which he could threaten the militias. Stirrup was concerned that a redeployment would look as though the British had been "bombed out of