| CPC H04B 1/385 (2013.01) [A61F 11/145 (2022.01); H04R 1/1041 (2013.01); H04R 1/1083 (2013.01); H04B 2001/3866 (2013.01); H04R 2420/07 (2013.01)] | 31 Claims |

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1. A communication apparatus for a hearing protection apparatus for a mission performing user, the communication apparatus comprising:
a sensor interface device comprising a first sensor interface and a second sensor interface configured to respectively connect with a first sensor device and a second sensor device; and
a processing unit;
wherein the processing unit is configured to:
obtain first sensor data via the first sensor interface, wherein the first sensor interface comprises a first connector for mechanical and electrical connection to the first sensor device, and wherein the first sensor data comprises information related to a physiological condition and/or mental condition of the mission performing user;
obtain second sensor data via the second sensor interface; and
determine user data based on the first sensor data and the second sensor data, wherein the user data is different from the first sensor data.
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