On sound field of a source placed close to rigid prolate spheroid

Acoustical field of the point monopole located near a pole or equator of the absolutely rigid immovable prolate spheroid is considered. It is shown that presence of such body close to the sound source can distort essentially the far field of the source. Areas of sound amplification and reduction are observed. It is also shown, that spheroid screening effectiveness in the area of the acoustical shadow is not significant in studied frequency range.