01743nab a2200229 i 4500001000400000003000900004005001700013008003900030040002600069041000800095044000800103080001100111100012600122245016300248260001000411520071600421650002801137650003001165700011901195773006701314700013201381BPPKOSZ 00520191005125034.0151112s1997    pl  n  f     |000  0eng  cKOSZ 005dKOSZ 005/HR  aeng  aPOL  a621.381 aSUSZYŃSKI, Zbigniew.d1996 - .bPolitechnika Koszalińska - Wydział Elektroniki,cKatedra Elektroniki Ciała Stałego10aPhotoacoustic measurements of the thermal diffusivity of solids in the presence of a drum effect /cZbigniew Suszyński, Mirosław Maliński, Leszek Bychto.  c1997.  aThe photoacoustic measurements of the thermal diffusivity of the thick plates of metals are discussed when the drum effect is not quenched. The dominant machanism responsible for the photoacoustic signal was determined. Depending on the configuration arrangement, the ratio of the thermal signal to the thermoelastic bending one was determined. The thermal diffusivity was obtainted from both the frequency dependence of the rear amplitude and rear phase characteristics. The influence of the thermoelastic bending on both rear and front frequency characteristics is discused. The way of calculation of the thermal diffusivity in the case of the results showing strong thermoelastic bending effect is discussed. 4aPrzewodnictwo cieplne.  0aTermodynamika techniczna.1 aBYCHTO, Leszek.d1996 - .bPolitechnika Koszalińska - Wydział Elektroniki,cKatedra Elektroniki Ciała Stałego0 iW :tArchives of Acoustics. -g1997, Vol. 22, nr 3, s. 343-3491 aMaliński, MirosławeAutord1996 - .bPolitechnika Koszalińska - Wydział Elektroniki,cKatedra Elektroniki Ciała Stałego