Timeline for Amplification before tubes and transistors were invented
Current License: CC BY-SA 3.0
3 events
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| Oct 10, 2017 at 3:50 | comment | added | SDsolar | Audio devices are transducers - so like antennas can indeed work both ways. One thing I would add is how hearing aids concentrate sound in the same way the microphone horns on the old phones. Of course it is all done with electronics now. But I always crack up when I see old photos of the elderly men holding up big horns to their ears, saying, "Eh?" | |
| Oct 3, 2017 at 20:13 | comment | added | Tejas Kale |
But they work both ways - Plugin your earphones into your microphone jack, fire up a sound recorder and see for yourself. Disclaimer: May involve yelling to get satisfactory results.
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| Oct 3, 2017 at 15:55 | history | answered | bobflux | CC BY-SA 3.0 |