This affordable, simple alarm clock has two nature sounds including ocean waves and birds chirping, as well as a few other sound settings and access to FM radio. You can also set a sleep timer for ...

From ocean waves to sound waves Nina Young ’07 By Kara Baskin February 23, 2022 ...

The underwater sounds can also produce seismic echoes: When sound waves traveling through the water meet the ground, some of the waves’ energy converts into a seismic wave (SN: 9/17/20).