Abstract: Electronic devices and methods are disclosed that adaptively filter a microphone signal responsive to vibration that is sensed in the face of a user speaking into a microphone of the device. An electronic device can include a microphone, a vibration sensor, a vibration characterization unit, and an adaptive sound filter. The microphone generates a microphone signal that can include a user speech component and a background noise component. The vibration sensor senses vibration of the face while a user speaks into the microphone, and generates a vibration signal containing frequency components that are indicative of the sensed vibration. The vibration characterization unit generates speech characterization data that characterize at least one of the frequency components of the vibration signal that is associated with the speech component of the microphone signal.

Abstract: A wireless communication system includes a transmitting device and a receiving device, in which the transmitting device generates a signal including information and transmits the signal by electromagnetic waves and ultrasonic waves in the same frequency in parallel, and in which the receiving device extracts the signal from at least one of the electromagnetic waves and the ultrasonic waves transmitted from the transmitting device and acquires the information included in the extracted signal.

Abstract: An underwater audio system includes a framing having at least one speaker mounted thereon and at least one upwardly extending arm member. The arm member(s) are arranged to slide under the strap of a diver's mask in use and to be held in place between the strap and the diver's head. Two speakers mounted on the frame are arrange to be located adjacent a diver's ear when the arm members are in place under the strap of the diver's mask.

Abstract: A support for earphone unit for a scuba diver mask (18) comprises a U-shaped base (20) with a rod (21) extending from it, associable to an earphone unit (12), to be arranged close to the scuba diver's ear, wherein the U-shaped base (20) in each of its two legs (23) can be attached to a carrying band (14) of the mask (11) by freely removable coupling means (24, 25) and a free end of the rod (21) is arranged into a seat (30) of the earphone unit (12).

Abstract: A wireless communication system, for example for underwater divers, wherein the receiver portion and the transmitter portion of the system are mounted at the user's ear and mouth, respectively, by a single strap. The single strap is also used to maintain the communication system electronics and the mouth mask securely in place.

Abstract: A wireless communication system, for example for underwater divers, wherein the receiver portion and the transmitter portion of the system are mounted at the user's ear and mouth, respectively, by a single strap. The single strap is also used to maintain the communication system electronics and the mouth mask securely in place.

Abstract: A wireless communication system, for example for underwater divers, wherein the receiver portion and the transmitter portion of the system are mounted at the user's ear and mouth, respectively, by a single strap. The single strap is also used to maintain the communication system electronics and the mouth mask securely in place.

Abstract: A microphone circuit control mechanism which is utilized to control the output of a microphone (20) disposed in a breathing mask (12) the microphone circuit extending to a communications device (22) and wherein the microphone circuit control mechanism includes a switch (86) in the microphone circuit, which switch can be toggled between "on" and "off" states in response to a drop in pressure within a pressure sensing chamber (44). The switch (86) is a single-pole double-throw magnetic reed switch which is disposed within the pressure sensing cavity (44), which cavity is in a demand regulator (14). The regulator includes a valve (27) capable of admitting air under pressure into the pressure sensing chamber when required. The magnetic reed switch (86) is toggled in response to movement of a magnet (112) carried by a portion (64) of a valve operating means (30) which portion moves in response to a drop in pressure in the sensing chamber (44).

Abstract: A speaking and hearing system for respirators, where the apparatus wearer is connected to a respiratory gas supply independent of the ambient air. A suppression, independent of acoustic signals, of the breathing noises of the apparatus wearer is provided by a switch device located in the respiratory gas line which reacts to the respiratory gas stream for the suppression of the breathing noises.