Abstract: The invention relates to a headset for a helmet. The headset comprises a speaker unit, a boom microphone and a skull microphone. The headset further comprises a switch configured to activate the boom microphone or the skull microphone based on the position of the boom microphone. The invention relates also to a helmet comprising the headset.

Abstract: Disclosed is a mounting system for mounting one or more accessory devices to a helmet. The system including a pair of mounting rails for attachment on respective sides on exterior of the helmet shell; and a clamping arrangement for attachment on exterior of the helmet shell between the pair of mounting rails substantially in the back portion of the helmet shell, wherein the clamping arrangement is coupled to at least one of the mounting rails via a coupling having an adjustable length for enabling attachment to helmet shells having various properties.

Abstract: According to an aspect of the present disclosure, an ear cup assembly for a hearing protector is provided. In accordance with an example, the ear cup assembly comprises an outer casing, a sealing ring detachably attached on the rim of the outer casing and suitable for sealingly abut against the head of a user around an ear of the user, and a user operable release mechanism for loosening the sealing ring from the outer casing, said release mechanism arranged within the outer casing.

Abstract: According to an example, a technique for image processing is provided, the technique comprising: obtaining a first image and a second image that at least partially illustrate the same real-world scene, wherein the first image comprises a visible light image and the second image comprises a thermal image; identifying one or more spatial portions of the second image that represent a predefined temperature range; identifying one or more spatial portions of the first image that illustrate the same portions of the real-world scene as illustrated in the identified one or more spatial portions of the second image; and deriving, based on the first image, a composite image wherein the identified one or more spatial portions of the first image are emphasized.

Abstract: The invention relates to a headset for a helmet. The headset comprises a speaker unit, a boom microphone and a skull microphone. The headset further comprises a switch configured to activate the boom microphone or the skull microphone based on the position of the boom microphone. The invention relates also to a helmet comprising the headset.

Abstract: A control device for selectively controlling a power supply from a power source via at least one of a first output and a second output. The control device including at least one processor and at least one memory storing at least one portion of computer program code, the processor being configured to cause the control device to obtain an indication of at least the following parameters: a charge level of the power source, power need from the first output, a power need from the second output; and selectively adjust the power supply via the first output and via the second output from the power source in dependence of the parameters. A power supply arrangement includes the control device.

Abstract: Disclosed is a method for operating an arrangement of a mobile communication device that includes an audio processor communicatively coupled to an accessory device that includes an audio transducer is provided, the method including adjusting at least one operating parameter in one or both of the audio processor and the audio transducer, the adjusting including obtaining, via the communicative coupling from the accessory device, an accessory type identification assigned for the accessory device, obtaining a device type identification assigned for the mobile communication device, selecting a respective predefined value for each of the at least one operating parameter in dependence of the obtained accessory type identifier and the device type identifier, and setting each of the at least one operating parameter into respective selected values for subsequent operation of the arrangement.

Abstract: According to an example embodiment, an arrangement is provided, the arrangement including a mobile communication device including a terminal device for wireless communication with one or more other devices via a communication channel, and a fire retardant sleeve having a shape and size that enable accommodating the mobile communication device therein, wherein at least part of the mobile communication device is enclosed within the fire retardant sleeve.

Abstract: An ear cup for a hearing protector includes a cup-shaped outer casing, a sealing ring on a rim of the outer casing, and at least one electrical component such as a microphone. The electrical component is mounted on a flexible circuit board attached on the outer surface of the outer casing, where the outer casing includes a slit through which the flexible circuit board extends to the inside of the outer casing so as to provide electrical connections between the electrical component and an electrical circuitry inside the outer casing. Thus, there is no need for wide openings on the outer casing of the ear cup, instead only a narrow slit suffices. This facilitates achieving good noise reduction properties.

Abstract: A wearable chassis for a helmet has a shape suitable to be worn on a head of a user and being attachable inside a protective structure having a shape protecting the user's from an external impact. The chassis includes one or more connection ports for connecting an electronic device, a control interface for connecting a control unit, a wiring arrangement for connecting the one or more connection ports to the control interface, and a mounting arrangement for attaching an accessory device to the chassis. Moreover, a helmet including such a chassis and the protective structure having a shape protecting a head of a user from an external impact attached to the chassis, as well as a helmet arrangement including such a chassis and one or more protective structures, each having a shape protecting a head of a user from an external impact, removably attachable to the chassis are provided.

Abstract: A wearable chassis for a helmet has a shape suitable to be worn on a head of a user and being attachable inside a protective structure having a shape protecting the user's from an external impact. The chassis includes one or more connection ports for connecting an electronic device, a control interface for connecting a control unit, a wiring arrangement for connecting the one or more connection ports to the control interface, and a mounting arrangement for attaching an accessory device to the chassis. Moreover, a helmet including such a chassis and the protective structure having a shape protecting a head of a user from an external impact attached to the chassis, as well as a helmet arrangement including such a chassis and one or more protective structures, each having a shape protecting a head of a user from an external impact, removably attachable to the chassis are provided.

Abstract: An electro-acoustical transducer device includes a body structure (101) and a differential microphone (102) located in an aperture of a wall of the body structure. The microphone includes a front side for receiving an acoustical signal and a rear side for receiving the acoustical signal in modified form. The differential microphone is arranged to produce an electrical output signal proportional to the difference of the acoustical signals at the front and rear sides. The body structure is arranged to form a chamber (105) shared with the rear side of the microphone. There are tubular channels (107) to the chamber so that the channels and the chamber constitute an acoustical filter for filtering the acoustical signal falling to the rear side of the microphone. With proper design of the chamber and the channels, it is possible to achieve acoustical filtering for background noise rejection.

Abstract: A method and arrangement for connecting an ad-hoc communication network (101) to a permanent communication network (102) via a half-duplex communication link (140). The ad-hoc communication network is established between communication devices (103-106) and a gateway device (107) using a routing protocol that is run in the gateway device and in the communication devices. Relaying of data between the ad-hoc communication network and the permanent communication network is controlled by setting the following relaying operations into a pre-determined order of mutual priority: relaying data from the ad-hoc communication network to the permanent communication network and relaying data from the permanent communication network to the ad-hoc communication network. The pre-determined order of priority facilitates data transfer via the half-duplex communication link between the permanent communication network and the ad-hoc communication network that can be either a full-duplex network or a half-duplex network.

Abstract: A method and arrangement for connecting an ad-hoc communication network (101) to a permanent communication network (102), e.g. to a cellular mobile communication network. The ad-hoc communication network is established between communication devices (103-106) and a gateway device (107) using a routing protocol that is run in the gateway device and in the communication devices. A protocol address that is associated in a communication device with a protocol data unit is determined on the basis of a control action given by a user of the communication device. In a gateway device, the protocol data unit is relayed to the permanent communication network if the protocol data unit is provided with a pre-determined protocol address. The user of the communication device can determine with the aid of the control action whether he is communicating only inside the ad-hoc communication network or via the permanent communication network.

Abstract: The invention relates a method and arrangement for presenting visual information responsive to an audio signal. A solution according to the invention comprises an audio detector (101) arranged to detect an arrival direction of the audio signal, a display device (103) arranged to generate visual information (108) indicating the arrival direction of the audio signal, and a position sensor (104) arranged to generate a position signal indicating a change of a rotational position of a display surface of the display device. The display device is arranged to update the visual information according to the position signal. The solution is able to generate a visual indicator that indicates a direction from which an audio signal having a limited temporal duration, e.g. a gunshot voice, has arrived with respect to a changing rotational position of the display surface.

Abstract: An electro-acoustical transducer device includes a body structure (101) and a differential microphone (102) located in an aperture of a wall of the body structure. The microphone includes a front side for receiving an acoustical signal and a rear side for receiving the acoustical signal in modified form. The differential microphone is arranged to produce an electrical output signal proportional to the difference of the acoustical signals at the front and rear sides. The body structure is arranged to form a chamber (105) shared with the rear side of the microphone. There are tubular channels (107) to the chamber so that the channels and the chamber constitute an acoustical filter for filtering the acoustical signal falling to the rear side of the microphone. With proper design of the chamber and the channels, it is possible to achieve acoustical filtering for background noise rejection.

Abstract: An earphone including a mounting element for mounting the earphone to an auricle is provided. The mounting element is attachable to a body of the earphone. The earphone further includes an adjusting element for adjusting the position of the mounting element with respect to the body of the earphone. A mounting element for mounting the earphone to an auricle is provided. The mounting element is attachable to a body of an earphone, and the mounting element includes an adjusting element for adjusting the position of the mounting element with respect to the body of the earphone.