Both experiment and theory of new type of spectroscopy of phonons in normal metals, called "point-contact spectroscopy", is presented. The second derivative of current over voltage for the point-contact junction is shown to be proportional to the "transport function of electron-phonon interaction" G(ω) = [MATH]2(ω) F (ω), where F(ω) is the density of phonon states and ([MATH]2(ω)) the squared matrix element of electron-phonon interaction averaged over the Fermi surface of the metal. The data revealing the anisotropy effects, and the role of the elastic scattering processes, are presented and discussed for the number of metals, including Pb, Sn, In, Al, Cu, Ag, Au, Zn, Cd, and partly Na. For the polyvalent metals, the [MATH]2(ω) is nearly constant quantity, whereas in the noble metals, it is a strongly decreasing function of the energy. For Na, [MATH]2(ω) increases as ω increases