Sound : an elementary text-book for schools and colleges (1913)
Capstick, John Walton, 1858- · leaf 131
oni on one side of thecentre there is rarefaction on the oth^r side, and so if thecentre of the segment is opposite the centre of the side tube,the small regions on each side of the centre of the segment,which are also opposite the end of the tube A, will neutralizeeach other. 147. Zones of Silence… … Fig. 60 from the shore the sound becomes audible again. These zonesof silence have been explained by Tyndall as being due tointerference. 146-148] BEATS 121 Let A be the fog-siren, and B the observer on the deck ofa ship. The sound can reach him by the direct line A B andalso by the path ACB where…
Sound
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