Where does this come from, and can I check it?

Continuous high-frequency radio waves transmitted voice and music on Christmas Eve. The figure is taken from IEEE History Center, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the Technology shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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Reginald Fessenden made the first wireless radio voice transmission in 1906

Continuous high-frequency radio waves transmitted voice and music on Christmas Eve

On 24 December 1906, Canadian inventor Reginald Fessenden used a high-frequency alternator to broadcast speech and music from Brant Rock, Massachusetts. Ship radio operators along the Atlantic coast heard Fessenden play O Holy Night on the violin and read a Bible passage. This was the first continuous wave radio amplitude modulation (AM) broadcast.

Reginald A. Fessenden House, Newton (Middlesex County, Massachusetts) — National Park Service photographer · Public domain · source

Where this comes from

IEEE History Center

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Tags: radio, broadcasting, telecoms

Reginald Fessenden made the first wireless radio voice transmission in 1906: the short answers

Where does this come from, and can I check it?: Continuous high-frequency radio waves transmitted voice and music on Christmas Eve. The figure is taken from IEEE History Center, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a technology fact?: Yes. It sits on the Technology shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.