I am unclear of the direction of your question. If you are suggesting fitting a microwave system to the engine to prevent knock, I would suggest it is far more expensive than conventional systems presently in use. Knock is a phenomenon connected with the growth in concentration of free radicals...
I guess you have read of blast walls aimed to attenuate high intensity waves. Of interest is their reflection back towards their source. Perhaps fitting your brick wall with a lining of a more efficient attenuator of sound, possibly sheet aluminium, might help.
What it fails to tell is whether the big bang's originates from dense high temperature matter or from closely packed photons with mass in the form of leptons and gluons resulting from photon-photon collisions, the biblical explanation.
As the leading front of the blast wave expands and encompasses more of the media it deays to form a sound wave which, as it expands drops in intensity. A further way to envisage the process, is that the blast front is formed from a given amount of energy and its propagation means a steadily...
A blast wave describes the situation in which a decaying front traveling above sound speed heats the gas behind it leaving a falling temperature gradient. To attain equilibrium a negative pressure is necessary.
Increases in pressure and temperature depend on the Mach Number of the shock, so that there is no general solution to the problem of condensation occurring in the flow behind it. There is a further problem in the definition of speed of sound in what may be an inhomogeneous mixture of air and...
The answer in terms of a realistic confined explosion is that the pressure at a given position is a function of time. The concept of an explosion assumes a flame extending from a source of ignition sending pressure waves towards the confinement. It is possible that these will combine to form a...