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A crystal earpiece typically consists of a piezoelectric crystal with metal electrodes attached to either side, glued to a conical plastic or metal foil diaphragm, enclosed in a plastic case. The piezoelectric material used in early crystal earphones was Rochelle salt, but modern earphones use barium titanate, or less often quartz.
Modern crystal sets use piezoelectric crystal earpieces, which are much more sensitive and also smaller. [104] They consist of a piezoelectric crystal with electrodes attached to each side, glued to a light diaphragm. When the audio signal from the radio set is applied to the electrodes, it causes the crystal to vibrate, vibrating the diaphragm.
Piezoelectric balance presented by Pierre Curie to Lord Kelvin, Hunterian Museum, Glasgow. Piezoelectricity (/ ˌ p iː z oʊ-, ˌ p iː t s oʊ-, p aɪ ˌ iː z oʊ-/, US: / p i ˌ eɪ z oʊ-, p i ˌ eɪ t s oʊ-/) [1] is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in ...
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It features a 6.4 in (160 mm) a 17:9 aspect ratio display. It has an earpiece speaker made of a cantilever piezoelectric ceramic. The proximity sensor uses ultrasound radar instead of an infrared light. The premium version of the model equipped with 6 GB RAM and 256 GB storage, and made by 18k Gold decoration on the back plates.
In August 2017, Mi MIX 2S was awarded the IDEA Gold Award for its design.. In reviews, the general feedback was favorable, with critics praising the more accessible elements of it over the original Mi MIX such as worldwide LTE bands, a lower price than the original Mi MIX, a smaller display and a traditional earpiece speaker to replace the piezoelectric speaker in the original Mi Mix.