Environmental Nuisance
Activities carried out by persons operating under this permit must comply with the
provisions of the Environment Protection Act 1993 in relation to environmental
nuisances.
Use of Voice Amplification Devices
The use of voice amplification devices is restricted to the following circumstances:
- Must not be used before 9am
- Must not be used between 9am and 8pm to project the user’s voice across any expanse of water eg. coaching, unless when correcting a safety related problem.
Voice amplification in boats is permitted between 6am and 8pm provided they are set at a level to be heard within the boat only, thereby minimising any noise disturbance to residents in the area.
Effective communication between the coxswain and the rowers is critical for the safety and success of the crew. While coxswains can use non-verbal cues like body language, hand signals, and steering commands, spoken communication remains an integral part of their role. Effective verbal coaching enhances the overall performance and safety of the crew.
Please note - in regard to the aquatic environment of West Lakes - noise is amplyified on the lake.
Reflection off surface of water
If the water is smooth or calm, the sound waves skim the surface of the water and are reflected toward the observer in the boat, adding to the amplification. However, if the water is choppy, the sound is randomly reflected and make no contribution to the amplitude of the sound.
Sound seems to be amplified when it travels over water, because the water cools the air above its surface. Cool air slows down the sound waves near the surface, causing refraction or bending of the sound wave.
Sound waves skimming the surface of the water can add to the amplification effect, if the water is calm.