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Sound travels about four times faster in water than in air

Sonar operators, marine biologists, and underwater engineers all depend on a single physical fact that shapes their work: ...
Deep Sea News

Bending sound, the weird path of sound in the ocean

Sound in the ocean does not behave like sound in the air. This is also what makes sound in the ocean so awesome. Sound in water is like the cool funky uncle of the sound family. It travels ...
New Scientist

Physicists have discovered the ultimate speed limit of sound

The universal speed limit of any kind of wave – be it electromagnetic or gravitational – travelling through a vacuum has been known since Albert Einstein developed his theory of special relativity in ...
Nature

Machine learning-based prediction and SHAP sensitivity analysis of sound speed in hydrogen-rich gas mixtures

The investigation and determination of the speed of sound in gases and gas mixtures have long been recognized as essential tools for analyzing their physical and chemical properties 1,2,3,4,5. In gas ...
Smithsonian Magazine

In a First, NASA’s Experimental X-59 Plane Flew Faster Than the Speed of Sound, Setting the Stage for ‘Quiet’ Supersonic Aircraft

The United States banned supersonic flights over its land in 1973 due to their ear-splitting sonic booms. Experts are building a plane that should travel at those speeds but create only gentle thumps ...
Nature

Underwater noise mitigation in the Santa Barbara Channel through incentive-based vessel speed reduction

Commercial shipping is the dominant source of low-frequency noise in the ocean. It has been shown that the noise radiated by an individual vessel depends upon the vessel’s speed. This study quantified ...