Logan Martin Lake Topics: Perpetual Motion;

Logan Martin Lake Topics

(Logan Martin Lake Specific)

4,313 messages

Updated 5/7/2024 1:43:10 AM

Off-Topic

Lakes Online Forum

83,627 messages

Updated 5/20/2024 12:16:20 AM

Boat Maintenance

Lakes Online Forum

5,193 messages

Updated 4/3/2024 3:47:36 AM

Logan Martin Lake Fishing

(Logan Martin Lake Specific)

126 messages

Updated 12/23/2022 9:21:15 AM

Jokes

Lakes Online Forum

4,169 messages

Updated 4/15/2024 11:05:05 PM

Sports

Lakes Online Forum

4,260 messages

Updated 3/24/2024 9:24:45 AM

Grilling & Recipes

Lakes Online Forum

2,976 messages

Updated 3/20/2024 11:53:43 PM

Tallapoosa River Topics

Lakes Online Forum

98 messages

Updated 4/15/2024 1:00:58 AM

Forum Usage Rules

Welcome, Guest

Select View Mode: [ classic | beta | recent ]

	Name:	dmp -
	Subject:	Perpetual Motion;
	Date:	5/7/2008 9:06:08 AM

The only difference in sound waves (air) and water waves is the density of the media and therefore the energy required to impart motion and the frequency used to impart that motion. The difference in density is what allows sound in water to travel much faster than in air.

I'm a professional mechanical engineer and have studied acoustics and sonic fatigue extensively.

It is true that a flat seawall will reflect more of the energy back to the source than a wave would upon impact with a randomly shaped seawall. However, there are far to many variables of wave motion (in a closed body -- i.e. lake) to extrapolate much meaningful info from that statement. Quite frequently, (wave motion in water) results in a reflected wave that is out of phase with the incoming wave and they tend to "cancel" each other out.