Abstract: A purpose of the invention is to provide a piezoelectric speaker that can serve as an antenna and can be used for frequencies in the MHz band, thereby it is possible to suppress enlarging of the size due to use of the piezoelectric speaker also as the antenna to a minimum level. The antenna (4) is provided on a frame (2a) that is a peripheral edge portion of the diaphragm (2). With this configuration, enlarging of the size can be suppressed to a minimum level while using the piezoelectric speaker also as the antenna, and it is possible to achieve space saving in a miniature electronic apparatus such as a mobile phone or the like when the piezoelectric speaker is adopted to the miniature electronic apparatus. In addition, the antenna (4) is a loop antenna formed in a loop shape. With this configuration, the piezoelectric speaker can be used for frequencies in the MHz band, which is used in, for example, a noncontact IC card technology.

Abstract: Disclosed is an electronic apparatus which can ensure waterproofness or dustproofness when a rectangular electroacoustic transducer is employed, and can prevent both distortion of voice and leakage of sound at the same time. A first casing (101) of the electronic apparatus has sound holes (110). A film member (103) is substantially circular and provided between the sound holes (110) and an electroacoustic transducer (107). A planar member (105) is provided between the film member (103) and the electroacoustic transducer (107) and has second sound holes (111). The electroacoustic transducer (107) is substantially rectangular and generates voice.

Abstract: A purpose of the invention is to provide a piezoelectric speaker that can serve as an antenna and can be used for frequencies in the MHz band, thereby it is possible to suppress enlarging of the size due to use of the piezoelectric speaker also as the antenna to a minimum level. The antenna (4) is provided on a frame (2a) that is a peripheral edge portion of the diaphragm (2). With this configuration, enlarging of the size can be suppressed to a minimum level while using the piezoelectric speaker also as the antenna, and it is possible to achieve space saving in a miniature electronic apparatus such as a mobile phone or the like when the piezoelectric speaker is adopted to the miniature electronic apparatus. In addition, the antenna (4) is a loop antenna formed in a loop shape. With this configuration, the piezoelectric speaker can be used for frequencies in the MHz band, which is used in, for example, a noncontact IC card technology.

Abstract: Provided is a speaker unit, which is enabled by a simple constitution to retain characteristics such as a satisfactory output sound pressure. The speaker unit 100 has a frame including a first casing 11 and a second casing 14. A sound hole 12 is formed at the center of the upper face of the first casing 11, and a fixing portion 13 is formed on the inner face side. Between the fixing portion 13 and the second casing 14, there is interposed a vibration absorbing member 15. This vibration absorbing member 15 stabilizes the arrangement of a speaker 10, and absorbs the mechanical vibrations to be generated from the speaker 10 at the action time of the speaker 10, thereby to vibrate the speaker 10, the first casing 11 and the fixing portion 13 homogeneously. As a result, the sound to be emitted from the speaker 10 through the sound hole 12 and the sound to be emitted by the mechanical vibrations transmitted from the speaker 10, through the first casing 11 are efficiently emitted.