Search Results for: Telephone answering machine sound recording
century, leading to groundbreaking advances in computing, communications, medicine, and practically every technically related field. without it, developments such as the personal computer, cellphones, the gps system, pacemakers, hearing aids, and the internet would not exist. it started with a bell telephone
crystal detector consisted of a small cylindrical piece of galena placed in proximity to a moveable arm which had a spring-like bronze wire called a cat's whisker that was used to contact the galena. after i assembled the parts and connected it to a wire antenna and cold water pipe, i listened for a sound...
https://www.nutsvolts.com/magazine/article/the-story-of-the-transistor