Search Results for: Sound reproducing using optical media
of a person's pupil may indicate whether they can hear or not. traditional ways of testing a person's hearing include tuning fork tests, speaker distance examination, and pure-tone threshold tests. these tests involve reflexes, such as raising the hand or pressing a button on hearing a particular sound
button if they heard noises at the frequency of , , , and kilohertz (khz), respectively. during the test, the participants also had to gaze at a computer screen. a dot appeared on the screen, followed by tones at random delays, which prevented the participants from predicting when they would hear the sound...
https://www.medicalnewstoday.com/articles/327462.php
district others beijing fob instruments and apparatus optical, photographic, medical or surgical,etc. export optical fbrs,optical fbr bundles, cables,excl those of headi beijing construction engineering co., ltd.
or surgical,etc. export optical fbrs,optical fbr bundles, cables,excl those of headi beijing zhuzong group co.,ltd dongsanhuan zhonglu, chaoyang district, beijing, china null beijing, chaoyang district kg usd/kg congo (cg) tianjin equipment / materials imported as investment by foreign-invested enterprises...
http://www.cybex.in/Global-Trade-Data/China-Exports-Data.aspx