A loudspeaker includes a support, a magnetic assembly, a first vibration assembly, and a second vibration assembly. The first vibration assembly and the second vibration assembly are respectively arranged on a first side and a second side opposite to the first side of the support; the first vibration assembly includes a first voice coil and a first vibration diaphragm, the second vibration assembly includes a second voice coil and a second vibration diaphragm, the first vibration diaphragm and the second vibration diaphragm are both connected to the support; and the support is provided with an accommodating space for arranging the magnetic assembly, a magnetic gap is formed between the magnetic assembly and the support, the first voice coil and the second voice coil are both at least partially located in the magnetic gap, the first vibration assembly and the second vibration assembly emit ultrasonic waves having different frequencies.

A loudspeaker includes a support, a magnetic assembly, a first vibration assembly, and a second vibration assembly. The first vibration assembly and the second vibration assembly are respectively arranged on a first side and a second side opposite to the first side of the support; the first vibration assembly includes a first voice coil and a first vibration diaphragm, the second vibration assembly includes a second voice coil and a second vibration diaphragm, the first vibration diaphragm and the second vibration diaphragm are both connected to the support; and the support is provided with an accommodating space for arranging the magnetic assembly, a magnetic gap is formed between the magnetic assembly and the support, the first voice coil and the second voice coil are both at least partially located in the magnetic gap, the first vibration assembly and the second vibration assembly emit ultrasonic waves having different frequencies.

A transducer includes: a piezoelectric element; and a film body including a film support portion having a hollow portion, and a vibration film connected to the film support portion and displaceable in a film thickness direction, the film body having the piezoelectric element stacked over the vibration film. The piezoelectric element includes: a first stacked body having a first pair of electrodes and a first piezoelectric film sandwiched between the first pair of electrodes; and a second stacked body having a second pair of electrodes and a second piezoelectric film sandwiched between the second pair of electrodes, the second stacked body being separated from the first stacked body.

A transducer includes: a piezoelectric element; and a film body including a film support portion having a hollow portion, and a vibration film connected to the film support portion and displaceable in a film thickness direction, the film body having the piezoelectric element stacked over the vibration film. The piezoelectric element includes: a first stacked body having a first pair of electrodes and a first piezoelectric film sandwiched between the first pair of electrodes; and a second stacked body having a second pair of electrodes and a second piezoelectric film sandwiched between the second pair of electrodes, the second stacked body being separated from the first stacked body.

An acoustic receiver includes a first receiver subassembly having bottom housing plate with at least a portion of a motor fastened thereto, and a second receiver subassembly having a closed-ended housing wall with at least one open end that is fastened to the bottom housing plate. A method of making and assembling the components is also described.

An acoustic receiver includes a first receiver subassembly having bottom housing plate with at least a portion of a motor fastened thereto, and a second receiver subassembly having a closed-ended housing wall with at least one open end that is fastened to the bottom housing plate. A method of making and assembling the components is also described.

The invention relates to an enclosure for diffusing sound by reverberation comprising: —a loudspeaker comprising a fixed frame, a cylindrical support and a membrane connected to an upper bearing surface of the frame; and—a wave guide mounted on the upper bearing surface, the wave guide being substantially in the form of a truncated pyramid with a long wall forming a front face, a short wall and lateral uprights; the wave guide comprising at least one acoustic wall fastened to the lateral uprights, the acoustic wall extending tangentially relative to the generatrix line of the cylindrical support closest to the front face.

The invention relates to an enclosure for diffusing sound by reverberation comprising: —a loudspeaker comprising a fixed frame, a cylindrical support and a membrane connected to an upper bearing surface of the frame; and—a wave guide mounted on the upper bearing surface, the wave guide being substantially in the form of a truncated pyramid with a long wall forming a front face, a short wall and lateral uprights; the wave guide comprising at least one acoustic wall fastened to the lateral uprights, the acoustic wall extending tangentially relative to the generatrix line of the cylindrical support closest to the front face.

A piezoelectric microelectromechanical system microphone comprises a support substrate, a piezoelectric element configured to deform and generate an electrical potential responsive to impingement of sound waves on the piezoelectric element, the piezoelectric element attached to the support substrate about a perimeter of the piezoelectric element, a sensing electrode disposed on the piezoelectric element and configured to sense the electrical potential, and corrugations defined in the piezoelectric element about the perimeter of the piezoelectric element to release residual stress and improve sensitivity of the piezoelectric microelectromechanical system microphone.

This disclosure relates to speakers and more specifically to an array speaker for distributing music uniformly across a room. A number of audio drivers can be radially distributed within a speaker housing so that an output of the drivers is distributed evenly throughout the room. In some embodiments, the exit geometry of the audio drivers can be configured to bounce off a surface supporting the array speaker to improve the distribution of music throughout the room. The array speaker can include a number of vibration isolation elements distributed within a housing of the array speaker. The vibration isolation elements can be configured reduce the strength of forces generated by a subwoofer of the array speaker.