The order forbids protesters from using any 'megaphone, klaxon, siren, whistle, drum, noise amplification or any other instrument or appliance to generate noise within the exclusion zone'.

Nuclear submarines generate noise from coolant pumps and turbo-machinery needed to operate the reactor, even at low power levels.

Additionally, the game includes marine life, such as whales and schools of fish, that could generate noise or reflect active sonar and create additional contacts.

Activities within a building generate noise that can travel through the structure and vibrations created outside (such as from road traffic) can travel through the ground and enter the building.

Perhaps in the future, grounds will be constructed with generating noise as a priority.