A wearable electronic device for detecting diver respiration comprises a transducer element and a processing element. The transducer element is configured to receive sonar waves and communicate a corresponding receiver electronic signal. The processing element is configured or programmed to receive the receiver electronic signal, identify that a breath of the diver has occurred from the receive electronic signal, determine a respiration rate of the diver based on a plurality of breaths, and present an indication of the respiration rate to the diver.

A wearable electronic device for detecting diver respiration comprises a transducer element and a processing element. The transducer element is configured to receive sonar waves and communicate a corresponding receiver electronic signal. The processing element is configured or programmed to receive the receiver electronic signal, identify that a breath of the diver has occurred from the receive electronic signal, determine a respiration rate of the diver based on a plurality of breaths, and present an indication of the respiration rate to the diver.

An apparatus is disclosed having a sensor configured to measure a biological parameter of a diver and transmit a sensor signal. A controller is configured to determine that the biological parameter value correlated to the sensor signal is anomalous and responsively issue a rescue deployment signal to a buoyancy valve assembly. The buoyancy valve assembly has an inlet port connectable to a source of pressurized gas and an outlet port connectable to a buoyancy control bladder. The buoyancy valve assembly configured to receive the rescue deployment signal and responsively supply pressurized gas from the inlet port to the outlet port and buoyancy bladder, whereby the diver may ascend the water surface, even if disabled.

An apparatus is disclosed having a sensor configured to measure a biological parameter of a diver and transmit a sensor signal. A controller is configured to determine that the biological parameter value correlated to the sensor signal is anomalous and responsively issue a rescue deployment signal to a buoyancy valve assembly. The buoyancy valve assembly has an inlet port connectable to a source of pressurized gas and an outlet port connectable to a buoyancy control bladder. The buoyancy valve assembly configured to receive the rescue deployment signal and responsively supply pressurized gas from the inlet port to the outlet port and buoyancy bladder, whereby the diver may ascend the water surface, even if disabled.

A method comprises transmitting (901) a first ultrasonic ping signal from a first floating unit (M1). The first ultrasonic ping signal is received in an underwater device (D1, D2, D3). After a predetermined delay from the reception of the first ultrasonic ping signal, the underwater device transmits (905) a second ultrasonic ping signal from the underwater device. The second ultrasonic ping signal is received in the first floating unit. The first floating unit determines a time difference between a time of transmission of the first ultrasonic ping signal from the first floating unit and a time of reception of the second ultrasonic ping signal, and based on the time difference, provides location information and/or other information to the underwater device by transmitting (910) to the underwater device sequential underwater ultrasonic ping signals such that time differences between the sequential underwater ultrasonic ping signals indicate the provided information.

The invention relates to a sound reproduction device which comprises a signal source, a power source, an amplifier, and a loudspeaker. The sound reproduction device further comprises an impedance measuring device and an analysis device. The impedance measuring device is connected to loudspeaker leads of the loudspeaker in order to measure impedance values, and the impedance measuring device is connected to the analysis device in order to forward the measurement results. The analysis device is also connected to the signal source and/or to the amplifier in order to adapt a signal fed to the loudspeaker.

The invention relates to a sound reproduction device which comprises a signal source, a power source, an amplifier, and a loudspeaker. The sound reproduction device further comprises an impedance measuring device and an analysis device. The impedance measuring device is connected to loudspeaker leads of the loudspeaker in order to measure impedance values, and the impedance measuring device is connected to the analysis device in order to forward the measurement results. The analysis device is also connected to the signal source and/or to the amplifier in order to adapt a signal fed to the loudspeaker.

The embodiments disclose a lighting device configured for projecting at least a 180 degree halo of light using at least one component module having a LED/lens light pod module, a mount configured for a user to wear the lighting device on a user's hand, at least one external battery pack and a navigation light device with the lighting device, wherein the lighting device and the navigation light device are configured to project a 360 degree light pattern and at least one sensor configured to automatically activate a front LED/lens light pod module when the user raises and points a hand to gain a predetermined distance forward focused beam in a pointing direction, wherein the at least one sensor activates left and right side LED/lens light pod modules for projecting a light pattern to a front and rear direction when the user's arm is at one's side.

A heat generation diving suit according to an embodiment of the present invention includes: a clothes unit made of a material having a waterproof function, and configured to cover at least a part of a user's body; a power transmission unit having a waterproof function, and configured to wirelessly transmit power of a battery unit; a power reception unit provided in the clothes unit, and configured to have a waterproof function, attach and detach the power transmission unit, and receive power wirelessly transmitted from the power transmission unit; and a heat generation unit configured to emit heat using the power supplied from the power reception unit.

A heat generation diving suit according to an embodiment of the present invention includes: a clothes unit made of a material having a waterproof function, and configured to cover at least a part of a user's body; a power transmission unit having a waterproof function, and configured to wirelessly transmit power of a battery unit; a power reception unit provided in the clothes unit, and configured to have a waterproof function, attach and detach the power transmission unit, and receive power wirelessly transmitted from the power transmission unit; and a heat generation unit configured to emit heat using the power supplied from the power reception unit.