Which pocket radio is best? Even when you have a smartphone, pocket radios are still handy devices to have. During a power outage, a pocket radio can be used to receive life-saving information, and ...

Acoustic frequency filters, which convert electrical signals into miniaturized sound waves, separate the different frequency ...

Researchers at RPTU create hybrid spin sound waves that could lead to adjustable 6G frequency filters and smarter microwave ...

It’s a question I’m sure was keeping you up at night: can you make an object spin with a sound wave? The answer, generally speaking, used to be no. Now, though, mechanical engineers have taken a look ...

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Sound vibrations leave the singer's mouth. The higher the pitch of the sound, the higher the frequency, or number of vibrations in a given amount of time. The sound enters the microphone, where it is ...

In these low-frequency bands, the signals are not heard in loudspeakers or headphones, or rather, the emission of sounds could occur but it is not the main activity, as is normally the case on other ...

A research team at City University of Hong Kong (CityU) has discovered a new type of sound wave: the airborne sound wave vibrates transversely and carries both rotation and orbital angular momentum ...

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. At the start of my career, I used to do acoustic testing in an anechoic chamber where sound ...