| 摘要 |
PCT No. PCT/EP93/02113 Sec. 371 Date Aug. 7, 1996 Sec. 102(e) Date Aug. 7, 1996 PCT Filed Aug. 9, 1993 PCT Pub. No. WO95/04929 PCT Pub. Date Feb. 16, 1995A cell for measuring acoustical properties for fluid sample includes a stack consisting essentially of a first end piece (20), a first, wafer-shaped electro-acoustical transducer (18), a main body (12), a second electro-acoustical transducer (16) and a second end piece (22). C-shaped clamps (24) or other means are used to apply pressure on the stack. The main body (12) and the end pieces (20, 22) form axially extending, aligned cavities (14, 29, 31). The main body (12) and each end piece (20, 22) has a radial channel (28; 32) which extends from the respective cavity to an opening at a circumferential surface. A thin elastic membrane (50) tightly encloses the stack. An annular member (51) is forced in each channel opening urging a portion of the sleeve (50) into the respective channel to form a pressure resistant seal.
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