Create a focused speaker so your music targets only the listener. That demodulates at 40 kilohertz, with an H-bridge and ...

Researchers in New Zealand have made what they believe is the first recording of a shark actively making noise. By Yan Zhuang Dolphins whistle. Whales sing. Fish croak, chirp, grunt, hum and growl.

Thanks to Jaws’ pulse-pounding theme, sharks are synonymous with a spine-chilling sound. In reality, they silently swim and scarf down prey without making a peep—until now, that is. These fish have ...

Researchers conducted a global study of the factors that influence bird sounds, using more than 100,000 audio recordings from around the world. Birds make sounds to communicate, whether to find a ...

Making a sound lens involves using a balloon filled with a gas denser than air, like carbon dioxide to bend sound waves and focus them, similar to how a glass lens bends light, making sound louder at ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Sharks have a ...