An apparatus and a method for generating a sound of an electric vehicle are provided. The apparatus determines whether a current condition may be a regenerative braking condition, generates a regenerative braking sound based on an amount of change in motor torque in the regenerative braking condition, and outputs the generated regenerative braking sound.

A hybrid input networked subwoofer includes a traditional line-in analog audio input for receiving analog audio content from non-networked audio source devices together with wired and/or wireless network interfaces for receiving digital audio content from one or more networked audio devices.

Disclosed is a magnetic circuit structure of a transducer comprising a static magnetic field generating device which comprises magnet sets, the magnet sets comprise a first magnet set magnetized in a moving direction of the transducer, a second magnet set and a third magnet set located in a direction orthogonal to a static magnetic field generated by the first magnet set, a magnetization direction of the second magnet set is orthogonal to that of the first magnet set, a magnetization direction of the third magnet set is orthogonal to that of the second and first magnet sets, the second and third magnet sets increase a magnetic induction intensity of the static magnetic field. The magnetic circuit structure of the transducer in the present disclosure can effectively solve the problem that a driving force of the transducer applying thereof is not sufficient, thus increasing the efficiency of electric-to-mechanical conversion.

An audio/video recording and communication device configured as a doorbell has a housing with a support structure and a removable faceplate. A flexible translucent membrane of the faceplate supports a button aligned with a mechanical switch when the removable faceplate is attached to the housing such that a plurality of light emitting elements are positioned around the mechanical switch transmit light through the translucent membrane. A removable battery casing is configured to hold at least one battery and has a release button physically coupling with a detent of the support structure to retain the removable battery casing within the support structure. The removable battery casing may be removed from the device for recharging without removing the device from a surface on which it is mounted.

Voice-controlled devices that include one or more speakers for outputting audio. In some instances, the device includes at least one speaker within a cylindrical housing, with the speaker aimed or pointed away from a microphone coupled to the housing. For instance, if the microphone resides at or near the top of the cylindrical housing, then the speaker may point downwards along the longitudinal axis of the housing and away from the microphone. By pointing the speaker away from the microphone, the microphone will receive less sound from the speaker than if the speaker were pointed toward the microphone). Because the voice-controlled device may perform speech recognition on audio signals generated by the microphone, less sound from the speaker represented in the audio signal may result in more accurate speech recognition, and/or a lesser need to perform acoustic echo cancelation (AEC) on the generated audio signals.

One of the main objects of the present invention is to provide a speaker with optimized overall acoustic performance. To achieve the above-mentioned object, the present invention provides a speaker including: a base with an accommodation cavity; a vibration sounding assembly accommodated in the accommodation cavity, including a first diaphragm and a second diaphragm, and a driver fixed to the first diaphragm for driving the first diaphragm and the second diaphragm to vibrate and produce sound. The second diaphragm stacks on the first diaphragm, and a stiffness of the second diaphragm is different from a stiffness of the first diaphragm.

Various embodiments of the invention pertain to augmented performance synchronization systems and methods. According to some embodiments of the invention, an audio waveform may be used to generate one or more haptic waveforms for one or more electronic devices. The haptic waveforms may be generated based on any of a number of factors, including features of the audio waveform, capabilities of the haptic actuators performing the haptic waveforms, the number, type and location of devices having haptic actuators, and the like. The haptic waveforms may be synchronized with performance of the audio waveform to provide an augmented listening experience to a user.

A method and an apparatus for removing dust in a sound outlet hole of a loudspeaker and a terminal device are disclosed. The method includes reading a prestored audio frequency for removing dust; and playing the audio file for removing dust. When the loudspeaker plays the audio file for removing dust, a wind speed in the sound outlet hole is at a maximum.

A person support apparatus, such as a bed, cot, stretcher, or the like, includes an active noise cancellation device configured to generate a noise cancelling sound wave that is designed to cancel a noise sound wave. The active noise cancellation device may include speakers and a microphone. In other embodiments, the person support apparatus includes a sound emitting component and a transmitter adapted to send out a notification signal prior to activation of the sound emitting component. The notification signal provides information about a characteristic of the sound to be emitted by the sound emitting device. The recipient of the notification signal may then use the signal to cancel the sound that is to be emitted. In some embodiments, the person support apparatus acts as a conduit for notification signals of upcoming sounds, receiving and forwarding such notification signals from and to other devices.

Systems and methods for assessing the visual acuity of person using a computerized consumer device are described. The approach involves determining a separation distance between a human user and the consumer device based on an image size of a physical feature of the user, instructing the user to adjust the separation between the user and the consumer device until a predetermined separation distance range is achieved, presenting a visual acuity test to the user including displaying predetermined optotypes for identification by the user, recording the user's spoken identifications of the predetermined optotypes and providing real-time feedback to the user of detection of the spoken indications by the consumer device, carrying out voice recognition on the spoken identifications to generate corresponding converted text, comparing recognized words of the converted text to permissible words corresponding to the predetermined optotypes, determining a score based on the comparison, and determining whether the person passed the visual acuity test.