Sound reducing system

A sound reducing system comprising:

• at least one sound reducing speaker for radiating a sound wave for sound reduction, the at least one sound reducing speaker comprising:
• a piezoelectric speaker that comprises:
• a piezoelectric film,
• a fixing face in contact with a support supporting the piezoelectric speaker, and
• a film holding portion disposed between the piezoelectric film and the fixing face, and wherein at least one of:
• (i) the film holding portion comprises a pressure-sensitive adhesive layer and the fixing face is formed of a surface of the pressure-sensitive adhesive layer or
• (ii) the film holding portion comprises a porous body layer, wherein the film holding portion includes an interposed layer, and the interposed layer is an ethylene propylene rubber foam layer having a porosity of 70% to 99%,
• wherein, in a state in which the piezoelectric film is held by the interposed layer, extension and contraction of the piezoelectric film in an in-plane direction of the piezoelectric film is converted into deformation of the piezoelectric film in a thickness direction of the piezoelectric film to bend the piezoelectric film and to generate sound from the piezoelectric film.