The acoustic sources comprise an electronic sine wave generator or a loud speaker and a pneumatic diaphragm horn,by varying the frequency generated,sound pressure,air-to-cloth ratio and the filtering medium,the results have been achieved for reverse-air alone and reverse-air/sonic cleaning.

Based on this analysis,a detailed discussion is presented for the fields of the corrugated horn and the corrugated horn under the balance condition in terms of the Gaussian mode theory,the Gaussian mode parameters for the corrugated horn are also determined.