Abstract: A display apparatus according to an embodiment of the present disclosure includes a thin plate-shaped display cell that displays image and a plurality of exciters disposed on a back surface of the display cell and causing the display cell to vibrate. The plurality of exciters is such configured that the plurality of exciters is regarded as one exciter when the plurality of exciters generates vibration in the display cell.

Abstract: A coil for a transducer includes a pair of first sections, a second section connecting to two ends of the first sections, and a third section connecting the other two ends of the first sections for forming a closed loop. The third section includes a pair of first stretch parts each extending from one first section toward the other stretch part, and a first extruding part extending from the first stretch parts away from the second section. The present coil can optimize the performance of the speaker.

Abstract: A coil for a transducer includes a pair of first sections, a second section connecting two ends of the first sections, and a third section connecting the other two ends of the first sections for forming a closed loop. The third section includes a pair of first stretch parts each extending from one first section toward the other stretch part, and a first concave part extending from the first stretch parts toward the second section.

Abstract: An earphone with adjustable impedance is provided. The earphone mainly includes an earphone body, a communication line, an earphone plug, an alter switch and an adjustable impedance unit used for adjusting an impedance of the earphone. The adjustable impedance unit is connected between the earphone plug and the earphone body through the alter switch. The impedance of the earphone can be matched on the output impedance of the media player by adjusting the impedance of the adjustable impedance unit when an earphone is connected with a media player.

Abstract: An electronic device (100) having a speaker (30) located in a sealed and separate speaker enclosure is described. The electronic device includes a housing (20), a circuit board (70), a cover (60), and two connecting bodies (50). The housing includes a cavity (22) defined therein for receiving the speaker. The circuit board is electrically connected to the speaker. The cover has through holes (622) defined thereon and is disposed between the housing and the circuit board. In addition, one end of the connecting bodies connects to the speaker, and the other end of the connecting bodies is configured to resist the circuit board via the through holes to electrically connect the speaker and the circuit board.

Abstract: An earphone speaker including a conductive housing, a micro speaker module, and a circuit board is provided. The conductive housing has a holding space. The micro speaker module is disposed in the holding space. The circuit board is disposed outside the conductive housing, and has a first surface facing towards the conductive housing and a second surface corresponding to the first surface. A positive terminal and a negative terminal are disposed on the second surface and electrically connected to the micro speaker module. A conductive material layer is disposed on the first surface and electrically connected to the negative terminal, and the conductive material layer is directly contacted with the conductive housing.

Abstract: Loudspeakers are provided that include a moveable magnet that can be positioned relative to the speaker piston. A user of the loudspeaker may position the moveable magnet to achieve a desired tone, distortion, or other sound without requiring the loudspeaker to be operated at an undesirable sound pressure level. The loudspeaker may include an indicator showing the relative position of the magnet relative to the piston to the user.

Abstract: A speaker device includes a terminal member, a connecting member, a conductive damper and a voice coil. The terminal member has a first connecting part, a slit, a hole, a second connecting part and a fixing part. The connecting member has a projecting portion on a bent portion and a groove at an area in the vicinity of a lower end of an outer peripheral wall of the cylindrical portion. The terminal member is mounted to the connecting member. A lead wire is wound around the slit of the connecting part, and a portion thereof is soldered. The projecting portion is inserted into the hole. The fixing part is inserted into the groove. The second connecting part is connected to a conductive member of the conductive damper disposed at the area in the vicinity of the lower end of the outer peripheral wall of the cylindrical portion by the soldering.

Abstract: In a speaker device, when an excessive driving signal larger than a withstand input is inputted to a voice coil, a voice coil bobbin moves with large magnitude. When the voice coil bobbin largely moves on a side opposite to a sound emitting side (downward), each component of the speaker device collides with each other and a large abnormal sound occurs. Therefore, a connecting member and a pot type yoke are designed to collide with each other via a buffer member in an area E1, for example, when the voice coil moves downward with the large magnitude. Namely, the buffer member is attached on a bottom surface of a bent portion of the connecting member, opposite to an upper surface of a cylindrical portion of the pot type yoke, in a circumferential direction.

Abstract: A transducer (1) includes a transducer axis (2), a membrane (3), a magnet system (6) having an outer magnet system part (7) and an inner magnet system part (8), a moving coil configuration (27) connected to the membrane (3) and having a coil carrier (28) and a moving coil (29) held by the coil carrier (28) in an air gap (14) between the two magnet system parts (7, 8), and guides (36) for rectilinearly guiding the moving coil configuration (27) parallel to the transducer axis (2). The moving coil configuration (27) has a cylindrical boundary surface (42) which, together with a cylindrical boundary surface (15) of the outer magnet system part (7), delimits a cylindrical gap (43) which is acoustically impermeable above a lower limit frequency of at most 100 Hz.

Abstract: An audio transducer having simple and single means to micro adjust the air gap between the driving element and the driven element.