Logo Comu Systems
CSM 3500 BN HV

CSM 3500 BN HV earmuff for helicopter operations

The CSM 3500 BN HV first-aid earmuffs are noise-cancelling earmuffs with a microphone that can be fitted to a protective helmet (make and type to be specified).
It will enable quality communications to be established in both quiet and noisy environments.
The earmuff’s numerous interfaces will enable it to be used in all helicopter rescue operations.


The CSM 3500 helmet is equipped with a low-level, high-impedance helicopter interface.
The CSM 3500 helmet will enable :

  • in flight, to communicate with the helicopter’s on-board personnel via the on-board intercom network
  • during hoisting and rescue operations, to communicate with other rescuers via the PMR radio network

Technical data