Miniature MEMS-based speakers could revolutionize speech and music reproduction in mobile communication devices. They combine the advantages of a large frequency bandwidth and high acoustic quality with the ability to generate very high sound levels. Nevertheless, they are so tiny that they can be integrated into headphones. By Christoph Hammerschmidt @ eenewseurope.com
The breakthrough has now been achieved. The characteristics of the chip-based loudspeaker are impressive: With currently a area of 4×4 millimeters, the MEMS loudspeaker can be optimally integrated into headphones, hearables and hearing aids. They cover the entire frequency range from 20 Hz to 20 kHz as a one-way system – comparable HiFi loudspeakers typically consist of woofer, a midrange loudspeaker and a tweeter for the high frequencies. The tiny MEMS speakers achieve a sound pressure level of 110 dB for in-the-ear applications – this corresponds to the noise level of a jet aircraft at a distance of 100 meters.
MEMS technology shrinks loudspeakers – [Link]