Abstract: A housing (1) accommodates various electrical, electronic, electromechanical and/or electropneumatic components (13) in a housing interior (2). A blower filter unit (19) is provided with such a housing (1). The housing (1) has at least one housing through-opening (4), arranged between the housing interior (2) and a housing environment (3), for receiving at least one functional unit (6) which, in a state received in the housing through-opening (4) is connectable to at least one of the components (13) arranged in the housing interior (2) for transmitting data, signals and/or power. The functional unit (6) is provided as an adapter module (9), which has a connector (10) that can be non-destructively detachably connected to a contact element (5) arranged in the housing through-opening (4), establishing a connection for transmitting the data, signals and/or power.

Abstract: A communication device (100), for monitoring breathing, includes a microphone unit (110), a monitoring unit (120) and an output unit (130). The microphone unit receives an acoustic signal (105), which indicates the breath sounds (350) of a communication device user (102), from a surrounding area (112) of the microphone unit, and converts same into a digital input signal (114). The monitoring unit is configured to receive the digital input signal and to split the indicated breath sounds into individual breaths (124) based on an amplitude- and/or frequency-dependent pattern recognition (122) and to determine a respective breath duration (125) of a breath. The monitoring unit triggers a breath alarm state (126) of the communication device as a function of a consecutive sequence of breath durations. The output unit is configured to output an alarm output (132) indicating the breath alarm state after a triggering of the breath alarm state.

Abstract: An oxygen self-rescuer (100) includes a gas cartridge (110), a mouthpiece (120), a tube (130) connecting the gas cartridge and the mouthpiece, a breathing bag (140) hydrodynamically connected to the gas cartridge and to the tube, and a spring assembly (150) within the breathing bag. The spring assembly includes a spring (153) fastened to the breathing bag and/or to the gas cartridge. The spring assembly has a pretensioned spring state in an unused packed-up state of the oxygen self-rescuer. The spring assembly leaves the pretensioned spring state with an externally triggered transition from the unused packed-up state into a use expanded state of the oxygen self-rescuer such that the spring assembly uplifts the breathing bag and generates a vacuum within the breathing bag. The vacuum draws breathable gas into the breathing bag and prepares the breathing bag for a ventilation of a user of the oxygen self-rescuer.