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.
In Virginia, a working toilet is not required on recreational motor boats, but if one is installed, it must be in compliance with sanitation regulations. A VHF radio is not mandatory for all recreational boats, but it is highly recommended for safety reasons, especially for vessels operating farther from shore. A bilge pump is required on vessels that are 16 feet or longer to manage water accumulation. Always check the latest regulations for any updates or specific requirements based on the type and size of the vessel.
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
In Mississippi, a recreational use boat is required to have a wearable personal flotation device (PFD) for each person on board, as well as a throwable flotation device. Additionally, boats must have a sound-producing device, such as a whistle or horn, and if the boat is over 16 feet in length, it must be equipped with a fire extinguisher. It's also essential for boats to have proper navigation lights when operating after dark.