Most states do require a muffling device on boats. Most states do have exceptions like the age of the boat, but may have to be under a decibel level or if it is a racing competition, there are other requirements for those.
A muffling device
A muffling device
A working toilet
A muffling device
The exhaust on a pleasure craft is underwater. The water muffles the engine noise.
noise produced by the ventilation system
The opposite of muffling a sound would be amplifying.
Muffling what? Muffling screams in your basement? Soundproofed walls. Muffling somebody's snoring in bed? A sturdy pillow over their face, held firmly, until subject is no longer moving or breathing noticeably.
In Oklahoma, all recreational motorboats are required to have a wearable personal flotation device (PFD) for each person on board. Additionally, boats that are over 16 feet in length must have a throwable flotation device, such as a buoyant cushion or a ring buoy. It is also mandatory for boats to have a sound-producing device, such as a whistle or horn, to signal distress or communicate with other vessels.
the muffling cat pooped in a toilet and peed on the ground
it is when you can not hear anything
In New York, all recreational boats must be equipped with a properly fitting personal flotation device (PFD) for each person on board. Additionally, boats over 16 feet in length are required to have a sound-producing device, such as a whistle or horn. Depending on the type of boat, other safety equipment may also be required, including fire extinguishers and visual distress signals. It's important for boaters to be familiar with specific regulations that may apply to their vessel.