Διαφορά μεταξύ των αναθεωρήσεων του «Μικρόφωνο»

καμία σύνοψη επεξεργασίας
 
==== Μικρόφωνα Electret ====
{{main|Electret microphone}}
[[Image:US Patent 3118022 - Gerhard M. Sessler James E. West - Bell labs - electroacustic transducer - foil electret condenser microphone 1962 1964 - pages 1-3.png|thumb|left|First patent on foil electret microphone by G. M. Sessler et al. (pages 1 to 3)]]
An electret microphone is a relatively new type of capacitor microphone invented at [[Bell laboratories]] in 1962 by [[Gerhard Sessler]] and [[James Edward Maceo West|Jim West]].<ref>{{cite journal
Ανώνυμος χρήστης