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Updated: May 11, 2025
The thing is easily constructed, and the result is a most complicated matter." "Well?" I queried, endeavouring to follow him. "The electric arc," he continued, "isn't always just a silent electric light. You know that. You've heard them make noises. Under the right conditions such a light can be made to talk the 'speaking arc, as Professor Duddell calls it.
Thus in 1903 it was found by Poulsen, elaborating on a principle first discovered by Duddell, that an oscillatory current may be derived from an electric arc maintained under certain conditions and that undamped high frequency waves so produced were suitable for wireless telegraphy.
That suggested to Duddell that a direct- current arc might be used as a telephone receiver. All that you need is to add a microphone current to the main arc current. The arc reproduces sounds and speech distinctly, loud enough, even, to be heard several feet away from the light." He had cut out the microphone again while he was talking to me.
It varies a little in different cities, but the people value being played through more than most things, I imagine. Duddell, the big Ipswich manufacturer he's a Quaker tried to bring in a bill to suppress it as unchristian." Pigeon laughed. "And?" "It cost him his seat next election. You see, we're all in the game."
Under the right conditions it can be made to speak exactly as the famous 'speaking-arc, as it was called by Professor Duddell, who investigated it. Both the arc- light and the metal-filament lamp can be made to act as telephone receivers." It seemed unbelievable, but Kennedy was positive.
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