49results about How to "Improve sound output" patented technology

Embodiments of the present disclosure relate to an organic light emitting display device which directly vibrates an organic light emitting display panel to generate sound, and includes: an organic light emitting display panel including a light emitting layer including an organic light emitting material layer and an encapsulation layer disposed at one side of the light emitting layer; and a sound generating actuator in direct contact with the organic light emitting display panel to vibrate the organic light emitting display panel to generate sound. Especially, the organic light emitting display panel is a bottom emission type device, and thus can prevent generation of a weighted color mixing phenomenon in a wide viewing angle at the time of panel vibration and reduce the thickness or weight of the panel to thereby enhance the sound generation characteristic.

The present invention relates to a sound converter, and, more particularly, to a sound converter which can solve a problem in that a vibration space decreases in the sound converter requiring high outputs, as the overall height of a voice coil increases.

Methods and apparatus for improving the acoustical performance associated with a speaker, such as a piezoelectric speaker, are disclosed. According to one aspect, an apparatus includes a substrate, a can mounted on the substrate, and a piezoelectric speaker arrangement. The piezoelectric speaker arrangement is at least partially mounted on the can. In one embodiment, the substrate is a printed circuit board (PCB) and the can is an electromagnetic interference (EMI) shielding can.

The invention provides a moving armature receiver, such as for a hearing aid, with at least two drive coils adapted to be driven by separate drive signal across different frequency ranges. This is achieved by a frequency dividing network adapted to split an audio input signal into first and second audio signals of predetermined different frequency ranges. In preferred two drive coil versions the frequency ranges overlap below 2-3 kHz, whether only one of the drive coils is active above 2-3 kHz. The drive coil being active in the upper frequency range has a lower impedance than the other drive coil. Thus, a more suitable effective impedance characteristics can be obtained. This enables an increased maximum acoustic high frequency output and an enhanced high frequency response of the receiver when driven by a low impedance amplifier, such as a class D amplifier. In a preferred embodiment the receiver is adapted to receive a digital audio input signal, the frequency division is performed digitally and two separate digital signals are applied to two separate digital amplifiers each operatively coupled to drive two separate drive coils. The invention also provides a hearing aid output stage adapted to drive a multiple coil moving armature receiver.

A speaker system with an enclosure having a spiral pathway is presented. The speaker system includes an electro-acoustic transducer that generates sounds according to an audio input. The speaker system also includes an enclosure having an interior pathway defined by a wall that is curved substantially as a spiral. The speaker system is configured such that the sound generated by the electro-acoustic transducer travels along at least a portion of the curved pathway before leaving the enclosure.