div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=sound-source-should-not-be-below-or-higher-than-600-above-the-plane-of-the-mountinghtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: sound source should not be below or higher than 600 above the plane of the mounting Phase distortion due to reflected sound energy from the boundary itself is eliminated loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentssitereader035viewer20220707075ea76dc68b5f6f25133a1be0html5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=sound-source-should-not-be-below-or-higher-than-600-above-the-plane-of-the-mountinghtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: sound source should not be below or higher than 600 above the plane of the mounting Phase distortion due to reflected sound energy from the boundary itself is eliminated loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentssitereader035viewer20220707075ea76dc68b5f6f25133a1be0html5thumbnails2jpg width=140 height=200 divdiv