公开(公告)号：US20240024709A1

公开(公告)日：2024-01-25

申请号：US18004154

申请日：2021-06-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Darin K. Thompson ,  Jeremy V, Barbee ,  Eric J. Bassani ,  Robert Heise ,  Michael J.Z. Norton

IPC: A62B18/08 ,  G10L21/0216

CPC classification number: A62B18/08 ,  G10L21/0216 ,  G10L21/0264

Abstract: A method of communicating using a breathing apparatus includes receiving an audio signal from a sound acquisition unit. The method further includes determining a state of the breathing apparatus based on the received audio signal. The state is at least one of a first state and a second state. The method further includes applying a first filter on the audio signal if the determined state is the first state. The first filter has a first frequency response. The method further includes applying a second filter on the audio signal if the determined state is the second state. The second filter has a second frequency response different from the first frequency response of the first filter. The method further includes generating an output signal based on the application of the first filter or the second filter. The method further includes receiving the output signal at an output device.