We have investigated Andreev reflection at interfaces between superconducting indium (<$ET sub c ~=~3,4~roman K>) and several normal conducting nonmagnetic metals (palladium, platinum, and silver) down to T = 0,1 K as well as zinc (<$ET sub c ~=~0,87~roman K>) in its normal state at T = 2,5 K. We analyzed the point-contact spectra with the modified onedimensional BTK theory valid for ballistic transport. It includes Dynes' quasiparticle lifetime as fitting parameter Г in addition to superconducting energy gap <$E2 DELTA> and strength Z of the interface barrier. For contact areas from less than 1 nm<^>2 to 10 000 nm<^>2 the BTK Z-parameter was close to 0,5, corresponding to transmission coefficients of about 80 %, independent of the normal metal. The very small variation of Z indicates that the interfaces have a negligible dielectric tunneling barrier. Also Fermi surface mismatch does not account for the observed Z. The extracted value <$EZ~symbol Ы ~0,5> can be explained by assuming that practically all of our point contacts are in the diffusive regime.