A damping material is made of a porous member having an absolute characteristic impedance value of not less than 800 kg/m.sup.2.multidot.S in the frequency range of from 1.0 to 3.0 kHz. A damping method has steps of providing a damping material in the interior or on the periphery of a vibration-generating apparatus, characterized in that as the damping material there is used a compressible porous member having an air permeability of from 1.times.1/10.sup.10 to 2.times.1/10.sup.2 cc/cm.sup.2 /sec based on an atmospheric pressure difference of 2.039.times.1/10.sup.4 mMH.sub.2 O or a porous member having an absolute impedance value of not less than 800 kg/m.sup.2.multidot.S in a frequency range of from 1 to 3 kHz or one obtained by providing a film layer thereon. A disc drive has a motor for rotating a disc as a data recording medium and a damping material provided in the interior and/or on the periphery of a housing having at least a space in which the disc can be mounted.