A hush kit is a retrofit modification used to reduce the noise produced by older aircraft jet engines. Hush kits are typically installed on older turbojet and low-bypass turbofan engines, as they are much louder than later high-bypass turbofan engines and often fail to meet modern limits for aircraft noise pollution.
A hush kit is a retrofit modification used to reduce the noise produced by older aircraft jet engines. Hush kits are typically installed on older turbojet and low-bypass turbofan engines, as they are much louder than later high-bypass turbofan engines and often fail to meet modern limits for aircraft noise pollution.
Source: Wikipedia "Hush kit" · CC BY-SA 4.0
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