SOUND INSULATING PLATE AND SOUND INSULATING DEVICE HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a lightweight sound insulating plate obtaining a significant sound insulating effect by substantially completely stopping vibration caused by a sound wave of a particular frequency. SOLUTION: The sound insulating plate 20 comprises a first plate-shaped body 1 formed of a thin plate provided with dynamic vibration absorbers 3. The dynamic vibration absorbers 3 are arranged on a first plate-shaped body 1 at intervals smaller than 1/2 of the wavelength of the bending wave which transfers bending deformation generated in the first plate-shaped body 1 by a sound wave of a particular frequency from a sound source. COPYRIGHT: (C)2008,JPO&INPIT