An in-line filter uses scalar coils positioned in series with an input of a speaker to modify or enhance the audio quality and of the speaker, and its auditory effects on a user, by changing the sound signature and reducing digital noise. Scalar coils have two spiral windings with opposite winding directions. Scalar coils can also be used in series with a laser emitter that produces a laser beam that travels through the scalar coil, which produce electromagnetic forces that improve perceived audio quality in a user.

An in-line filter uses scalar coils positioned in series with an input of a speaker to modify or enhance the audio quality and of the speaker, and its auditory effects on a user, by changing the sound signature and reducing digital noise. Scalar coils have two spiral windings with opposite winding directions. Scalar coils can also be used in series with a laser emitter that produces a laser beam that travels through the scalar coil, which produce electromagnetic forces that improve perceived audio quality in a user.

Provided in the present disclosure are an integrated bone conduction sound generating device and method. The device includes a controller, a sound generating structure and a functional structure, and the three components are integrated together. The functional structure can touch the oral cavity and/or the teeth of the human body, and after the controller drives the sound generating structure to generate a vibration signal, the functional structure can transmit the vibration signal to the auditory system of the human body through the oral cavity and/or the teeth of the human body.

Provided in the present disclosure are an integrated bone conduction sound generating device and method. The device includes a controller, a sound generating structure and a functional structure, and the three components are integrated together. The functional structure can touch the oral cavity and/or the teeth of the human body, and after the controller drives the sound generating structure to generate a vibration signal, the functional structure can transmit the vibration signal to the auditory system of the human body through the oral cavity and/or the teeth of the human body.

Aspects of the subject technology relate to a device comprising a moving-coil speaker including a diaphragm to play low-frequency signals from an audio-signal source, and a piezoelectric transducer coupled to the diaphragm to play high-frequency signals from the audio-signal source. A coupler couples the diaphragm to a housing of the device.

A medical device prosthesis, including a housing and a piezoelectric transducer including a piezoelectric component, wherein the piezoelectric transducer is supported in the housing via at least one spring. In some embodiments, the medical device prosthesis is a bone conduction device, such as a transcutaneous passive or active bone conduction device.

A medical device prosthesis, including a housing and a piezoelectric transducer including a piezoelectric component, wherein the piezoelectric transducer is supported in the housing via at least one spring. In some embodiments, the medical device prosthesis is a bone conduction device, such as a transcutaneous passive or active bone conduction device.

Aspects of the subject technology relate to a device comprising a moving-coil speaker including a diaphragm to play low-frequency signals from an audio-signal source, and a piezoelectric transducer coupled to the diaphragm to play high-frequency signals from the audio-signal source. A coupler couples the diaphragm to a housing of the device.

Aspects of the subject technology relate to a device comprising a moving-coil speaker including a diaphragm to play low-frequency signals from an audio-signal source, and a piezoelectric transducer coupled to the diaphragm to play high-frequency signals from the audio-signal source. A coupler couples the diaphragm to a housing of the device.

Some embodiments of the present invention disclose a miniature sounder. The miniature sounder includes a frame, and a vibration system and a magnetic system that are fixedly connected to the frame; the magnetic system includes a lower clamping board, a primary magnet that disposed on the lower clamping board, a cushion that disposed on the lower clamping board and surrounding the primary magnet and a secondary magnet that disposed on the cushion and surrounding the primary magnet, the cushion being disposed between the secondary magnet and the lower clamping board; and the vibration system includes a voice diaphragm, a voice coil that disposed below the voice diaphragm and causing the voice diaphragm to vibrate and generate a sound and a vibration diaphragm elastically supporting the voice coil, the vibration diaphragm comprising a corrugated rim portion, a fixing portion and a connecting portion.