公开(公告)号：AU2021406181B2

公开(公告)日：2025-04-03

申请号：AU2021406181

申请日：2021-12-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： JOHANSSON MAGNUS S ,  MANGAM ABEL GLADSTONE ,  HJORT PATRICK R T ,  URBAN HENNING T

IPC: G08B21/02 ,  A61F11/06 ,  A61F11/08 ,  A61F11/14

Abstract: Hearing protection device (10, 10', 10") with an indication unit (40a, 40b) and a detection unit (30, 30', 30") to send a first detection signal, to assign a distance value based on a second detection signal of an external device (50, 50') representing the physical distance to the external device (50, 50') and to control the indication unit (40a, 40b) to provide an indication to the user (100) 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 (100), 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 (10, 10', 10") and an external device is also provided. Furthermore, a method of retrofitting a hearing protection device (10'") with such a detection unit (30, 30', 30") is provided.

公开(公告)号：AU2019244700B2

公开(公告)日：2021-07-22

申请号：AU2019244700

申请日：2019-03-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： APELQVIST STEFAN M ,  GIDLA VIJAY K ,  MANGAM ABEL GLADSTONE ,  KIHLBERG ROGER

IPC: G10L25/78 ,  A61F11/14 ,  H04R3/00 ,  H04R27/00

Abstract: 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.