Nanotubes used in earphones may produce a new audio experience by utilizing the thermoacoustic effect
Over the years, headphones have become very ubiquitous. You can buy them for a few dollars in the checkout lane at your local Walmart and many smartphones ship with a cheap generic pair of headphones right and the box. It also spend hundreds of dollars on audiophile grade headphones. One thing that all these headphones have in common is that they utilize speaker drivers on the inside that rely on moving parts to create sound. Scientists have created a new type of headphone that uses carbon nanotubes and features no moving parts. The headphones use an internal speaker that produces audio using what’s called the thermoacoustic effect. Typically new products using cutting-edge technology very expensive, but reports indicate carbon nanotube headphones may be reasonably priced. The thermoacoustic effect the headphones use to create sound relies on the expansion and contraction of air. Mechanical engineer Yang Wei from Tsinghua University said of the project: We found that processing t...