infrared rayinfrastructure
infrasound (English) [ IPA: infrasound ASM: ইনফ্ৰাচাউণ্ড]
Contributed by: Mrinal Nath on 2008-03-06
1. (Abstract Noun) a sound having frequency below 20 hertz whhich is not audible to human ear মানুহে নুশুনা আৰু বিশতকৈ কম কম্পনাংকৰ শব্দ