Temporal theories offer an alternative that appeals to the temporal structure of action potentials, mostly the phase-locking and mode-locking of action potentials to frequencies in a stimulus. The precise way this temporal structure helps code for pitch at higher levels is still debated, but the processing seems to be based on an autocorrelation of action potentials in the auditory nerve. However, it has long been noted that a neural mechanism that may accomplish a delaya necessary operation of a true autocorrelationhas not been found. At least one model shows that a temporal delay is unnecessary to produce an autocorrelation model of pitch perception, appealing to phase shifts between cochlear filters; however, earlier work has shown that certain sounds with a prominent peak in their autocorrelation function do not elicit a corresponding pitch percept, and that certain sounds without a peak in their autocorrelation function nevertheless elicit a pitch. To be a more complete model, autocorrelation must therefore apply to signals that represent the output of the cochlea, as via auditory-nerve interspike-interval histograms. Some theories of pitch perception hold that pitch has inherent octave ambiguities, and therefore is best decomposed into a pitch chroma, a periodic value around the octave, like the note names in western musicand a pitch height, which may be ambiguous, that indicates the octave the pitch is in.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Pitch perception has inherent octave what?
Ah, so.. ambiguities

1 CATOBAR carrier: Charles de Gaulle is a 42,000 tonne nuclear-powered aircraft carrier, commissioned in 2001 and is the flagship of the French Navy (Marine Nationale). The ship carries a complement of Dassault-Breguet Super Etendard, Dassault Rafale M and E2C Hawkeye aircraft, EC725 Caracal and AS532 Cougar helicopters for combat search and rescue, as well as modern electronics and Aster missiles. It is a CATOBAR-type carrier that uses two 75 m C133 steam catapults of a shorter version of the catapult system installed on the U.S. Nimitz-class carriers, one catapult at the bow and one across the front of the landing area.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What type of carrier is the Charles de Gaulle?
Ah, so.. CATOBAR

A week after the implementation of the no-fly zone, NATO announced that it would be enforced. On 30 April a NATO airstrike killed Gaddafi's sixth son and three of his grandsons in Tripoli, though Gaddafi and his wife were unharmed. Western officials remained divided over whether Gaddafi was a legitimate military target under the U.N. Security Council resolution. U.S. Secretary of Defense Robert Gates said that NATO was "not targeting Gaddafi specifically" but that his command-and-control facilities were legitimate targetsincluding a facility inside his sprawling Tripoli compound that was hit with airstrikes on 25 April.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What city did NATO bomb on 25 April?
Ah, so..
Tripoli