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 Armed Forces, Stirrup viewed the solution as being essentially political. In order to take action against the militias, the local British commander in South East Iraq developed a plan to conduct aggressive operations against them. At the same time Stirrup became increasingly concerned that strong political leadership from the Iraqis was lacking and that without this any gains made by the military actions against the militias would be to no avail. In July 2006, Stirrup overturned the previous military advice to the Defence Secretary by stating that force levels in South East Iraq would need to be maintained. Previously it