Cannon Muzzle Noise Suppression Facility Analysis and Tests

Preliminary report on proposed baffled noise abatement structure

“…Nevertheless, significant noise reduction was achieved, proving that reactive mufflers can be successfully used to reduce artillery noise. Similar conclusions can also be drawn from Pansier, 1989, Sneck et al, 1980, and Walton, 1990 4.…”

“…Even though the acoustic wave propagation from a signal generated by an electric spark is not the same as that from the shockwave generated by the discharge of a gun, the data from the model test and available information on full scale tests are encouraging enough to justify continuation of the study of a baffled tunnel structure. It is recommended that the next stage of the study concentrate on two areas: (1) laboratory studies (similar to those reported by Sneck et al, 1980) and mathematical modeling; and (2) use of a larger-scale model (a 1/4 scale corrugated steel or aluminum structure) and appropriate (smaller than 120 mm) caliber…”

“…Several sets of data for full scale experiments with reactive mufflers are available (Sneck et al, 1980, Walton, 1990, Salisbury, 1969. One set of data (Walton, 1990) is presented hereafter.…”

“…The reactive muffler concept has been successfully applied in the past to the noise attenuation of artillery of similar or larger caliber than that considered In this project (Sneck et al, 1980, Walton, 1990, Salisbury, 1969. However, the proposed structure is larger in size and has a larger terminal opening than structures that were built in the past.…”