Better Sound with Just a Few Micrometers
PEEK Membranes in Micro Speakers
Victrex has introduced a line of ultra-thin APTIV-DBX films for micro speakers. The 3 to 6 µm-thick films are intended for smartphones and headphones.
In the highly competitive smartphone and mobile devices market, the electronics industry faces the challenge of manufacturing improved micro speakers with better quality and performance. They have to provide better audio output along with a wider frequency range in order to generate a louder, richer audio experience, without impairing the functioning of the device. Membranes that are only a few micrometers thick play a key role in the sound of micro speakers. However, even slight variations in the thickness of the films and membranes impair their acoustic performance. This can be avoided with improved material quality and a comprehensive understanding of design and processing.
Thickness Tolerance of ±5 %
The APTIV-DBX film from Victrex was specially developed for micro speaker membranes. It is made of polyether ether ketone (PEEK). According to the manufacturer, the film, with a thickness tolerance of ±5 %, allows more uniform laminate thickness and consequently can be manufactured with greater consistency. This is claimed to lead to lower variability in the fundamental frequency (F0**) and total harmonic distortion (THD**), resulting in more uniform acoustic performance. In addition, according to Victrex, the reduced thickness deviation in the film helps to improved output and therefore lowers manufacturing costs by reducing rejects.
Victrex Europa GmbH
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