3m Innovative Properties Company

Abel Gladstone Mangam

David Lawrence Albean

Paul D Henry

Cameron J Fackler

Henning T Urban

Oscar L Kårekull

Patrick R T Hjort

Andreas T Andersson

William Bedingham

Caroline M Ylitalo

Roger Kihlberg

Jonas A Nilsson

Vijay K Gidla

Stefan M Apelqvist

Magnus S Johansson

Erik O Levholt

Patrick RT Hjort

Hearing protection device (″) with an indication unit () and a detection unit (″) to send a first detection signal, to assign a distance value based on a second detection signal of an external device () representing the physical distance to the external device () and to control the indication unit () to provide an indication to the user () if the assigned distance value is at or below a predetermined threshold distance value. Thus, a collision may easily and reliably be prevented by providing an indication to the user (), so that the risk of missing relevant sound of a moving person or object is overcome. A collision warning system comprising such a hearing protection device (″) and an external device is also provided. Furthermore, a method of retrofitting a hearing protection device ('″) with such a detection unit (″) is provided.

Hearing protection device, collision warning system and method of retrofitting a hearing protection device with a detection unit

The present disclosure relates to a hearing protector () with a sensor module () having a module sensor (). The sensor module () is removably attached to the cushion () and the cup (A,A) of the earmuff () of the hearing protector (). The hearing protector () according to present disclosure allows the arrangement of sensors at a hearing protector () in an easy and cost-efficient way even with multiple sensors. The advantage of such a hearing protector () is an easy, compact and reliable solution of a hearing protector () providing information about the environment and about the conditions of the user () or worker using such a hearing protector (). Also, a method of retrofitting such a sensor module () to a hearing protector () is provided. Such a method is advantageous because reversible retrofitting of existing hearing protectors () not having the required functionality of sensors is provided.

Hearing protector with sensor module and method of retrofitting a hearing protector with a sensor module

A hearing protection system is provided. The hearing protection system has a first active hearing protection system. The first active hearing protection system is level-dependent. The hearing protection system also has a second active hearing protection system. The second active hearing protection system is level-dependent. Each of the first and second active hearing protection systems are configured to operate in an independent mode and a dual-protection mode. A dual-protection mode level dependent function of the second active hearing protection system is different than an independent mode level dependent function.

Dual hearing protection system

A voice-activated encoding method includes determining a voice power parameter based on a frequency domain representation of a voice signal from a voice microphone. The method includes determining an ambient power parameter based on a frequency domain representation of at least one ambient signal from at least one ambient microphone spaced from the voice microphone. The method also includes enabling encoding of an audio signal based on the voice signal in response to comparing the power parameters and a threshold value. A headset including a controller may use the method to determine whether to enable or disable encoding, transmission, or both of an audio signal to another device.

Voice-activated sound encoding for headsets using frequency domain representations of microphone signals

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Värnamo, Sweden

Abel Gladstone Mangam