A speaker system having a first speaker and a first speaker diaphragm, a second speaker and a second speaker diaphragm. and a serrated waveguide, wherein the serrated waveguide acoustically couples the first speaker diaphragm with the second speaker diaphragm.

A capacitive microphone and method of fabricating the same are provided. One or more holes can be formed in a first printed circuit board (PCB). A diaphragm can be surface micro-machined onto an interior surface of the first PCB at a region having the one or more holes. Interface electronics can also be interconnected to the interior surface of the PCB. One or more spacer PCBs can be attached to a second PCB to the first PCB, such that appropriate interconnections between interconnect vias are made. The second PCB and first PCB with spacers in between can be attached so as to create a cavity in which the diaphragm and interface electronics are located.

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 5 GHz wireless stereo sound system having a transmitter and a receiver; the transmitter and the receiver are wirelessly connected via a 5 GHz signal. The 5 GHz wireless stereo sound system wirelessly transmits on a 5.2/5.8 GHz frequency in 24-bit/48K digital only, thereby avoiding interference from wireless devices that transmit on 2.4 GHz frequency band (including Bluetooth and personal area networks), infrared devices and so forth, thus solving the problems of mutual interference between conventional wireless devices and instability of signal transmission, thereby ensuring transmission stability.

Apparatuses, systems, methods, and software for bodily function sound anonymization.

Various embodiments of the present disclosure are directed towards an integrated circuit (IC) chip in which a pad barrier layer caps a pad of a piezoelectric device. The pad barrier layer is configured to block hydrogen ions and/or other errant materials from diffusing to the piezoelectric layer. Absent the pad barrier layer, hydrogen ions from hydrogen-ion containing processes performed after forming the pad may diffuse to the piezoelectric layer along a via extending from the pad to the piezoelectric device. By blocking diffusion of hydrogen ions and/or other errant materials to the piezoelectric device, the pad barrier layer may prevent delamination and breakdown of the piezoelectric layer. Hence, the pad barrier layer may prevent failure of the piezoelectric device.