The present disclosure relates to a communication
system configured to be used in a demanding environment, the communication
system comprising a first in-ear device (103, 303a, 303b) comprising a tip (323, 323a, 323b, 337), the tip (323, 323a, 323b, 337) having a distal end (331) and a proximal end (333) and being configured to be inserted into an
ear canal of a user (101) with the proximal end (333) being closer to an
inner ear of the user (101) than the distal end (331) when the user (101) is wearing the in-ear device (103, 303a, 303b), wherein the tip (323, 323a, 323b, 337) comprises a user
compressible material (337) and is further configured to be inserted into the
ear canal of the user (101) in a compressed state and, to expand over time into a less compressed state where at least a part of an exterior of the tip (323, 323a, 323b, 337) touches and engages with the
ear canal of the user (101) thereby attenuating sound from the demanding environment before reaching the
inner ear of the user, wherein the user
compressible material (323, 323a, 323b, 337) has a predetermined expansion time so that the tip (323) expands from the compressed state at a first point in time (T0) to the less compressed 15 state at a second point in time (T1), where a sound attenuation effect of the tip (323, 323a, 323b, 337), at the second point in time (T1), has reached at predetermined attenuation level, and where the time between the first (T0) and second points in time (T1) is at least greater than 40 seconds.