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.

A MEMS loudspeaker for generating sound waves in the audible wavelength spectrum includes a carrier substrate with a substrate cavity with two substrate openings formed on two opposite sides of the carrier substrate, and a diaphragm anchored in the substrate. An actuator structure is arranged in the region of one of the two substrate openings and configured to vibrate the diaphragm to generate sound waves. An intermediate cavity is formed in a space between the diaphragm and the actuator structure. A coupling element is disposed in the intermediate cavity and connects the actuator structure to the diaphragm and can vibrate with respect to the carrier substrate.

The present disclosure relates to a Bluetooth speaker, including: an interface unit, a processor, a Bluetooth unit configured to receive and transmit audio signals, and a speaker. One end of the interface unit is configured to connect to a main controller of the robot and another end of the interface unit is configured to connect to the processor. The processor further connects to the Bluetooth unit. The Bluetooth unit connects to the speaker. The present disclosure may be implemented in robots to have more fan and improve user experience.

There is provided an amplifier module which includes a plurality of input terminals; a plurality of amplifier circuits configured to amplify a plurality of input signals which are input from each of the plurality of input terminals and output a plurality of amplified signals; and at least one speaker which is directly connected to at least one output terminals from among the plurality of amplifier circuits, wherein the amplifier module may output the plurality of amplified signals to the at least one speaker based on a number of the at least one speaker.

In a first example, an imaging system includes a battery comprising a structural gap. The battery is configured to provide electrical power to the imaging system. The imaging system further includes an image sensor configured to sense light that passes through the structural gap. In a second example, a vehicle door includes a frame and a battery comprising a structural gap. The battery is positioned within the frame and is configured to provide electrical power to the vehicle. The vehicle door also includes a handle assembly configured to open the door. The handle assembly is positioned within the structural gap of the battery. In a third example, a loudspeaker includes a battery comprising a structural gap and an audio driver positioned within the structural gap. The battery is configured to provide electrical power to the audio driver to generate sound waves.

A control circuit, an electronic cigarette and a method for controlling the electronic cigarette, the control circuit includes at least one airflow sensor, a microcontroller, a battery, an audio module and an indication unit; the airflow sensor for collecting an airflow signal, converting the airflow signal into a smoking signal and sending the smoking signal to the microcontroller, the microcontroller is used for controlling the audio module to give out hookah-simulating water sounds according to the received smoking signal and simultaneously controlling the indication unit to display a smoking color; and the microcontroller is further used for controlling the indication unit to display different indication colors according to different charging states of the battery. Therefore water sounds can be given out by electronic simulation, and the function of electronically simulating real hookah water sounds is conducive to usage of the electronic cigarette and smoking cessation.

A security system configured to be attached about the neck of a dog, includes a collar having opposed ends, each end having a fastener such that the belt is configured to be selectively coupled about the dog's neck. A monitoring assembly is mounted to the collar, the monitoring assembly including a microphone and a processor in data communication with the microphone. A transmitter is operatively connected to the processor. A response assembly is displaced from the monitoring assembly that includes a speaker in data communication with the processor, the processor configured to selectively actuate the speaker when the processor determines that the microphone has detected a predetermined sound, such as the bark of an intruding dog. The displaced speaker may then emit the sound of a menacing guard dog until the sound of an intruding dog is no longer detected.

A security system configured to be attached about the neck of a dog, includes a collar having opposed ends, each end having a fastener such that the belt is configured to be selectively coupled about the dog's neck. A monitoring assembly is mounted to the collar, the monitoring assembly including a microphone and a processor in data communication with the microphone. A transmitter is operatively connected to the processor. A response assembly is displaced from the monitoring assembly that includes a speaker in data communication with the processor, the processor configured to selectively actuate the speaker when the processor determines that the microphone has detected a predetermined sound, such as the bark of an intruding dog. The displaced speaker may then emit the sound of a menacing guard dog until the sound of an intruding dog is no longer detected.

A device includes an EMG processing application operable with a processing module to receive audio output from EMG testing, wherein the audio output represents electrical activity of at least one muscle. The EMG processing application is operable to process the audio output to detect at least one type of waveform of a plurality of types of waveforms from the audio output and display the detected at least one type of waveform.

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.