Does the EC135 helicopter sound different from other helicopters?

Question

Am I the only who notices this? It sounds pretty cool.

Answer 1

EurocoThen model calculations for noise exposure by different ... the least noisy of these standard rescue helicopters is EC 135 whereas ... Noise levels of other helicopter types ...

Answer 2

A lot of the noise is actually the blades, air, and gearbox. The engines aren't really different between military and civilian helicopters. ... For the most part turbine engines sound very similar. Other characteristics will affect the sound though, like the main and tail rotor blades, airspeeds, power settings, etc.

Answer 3

A lot of the noise is actually the blades, air, and gearbox. The engines aren't really different between military and civilian helicopters. ... For the most part turbine engines sound very similar