Leachim
Synthetic speech device
Leachim was an early example of Diphone synthetic speech and demonstrated how voice branching could be done quickly via computer discs to create understandable speech (i.e. verbal output). This method combined phonemes, words, and sentences to form verbal responsive messages when prompted by the computer. The device received world-wide attention, with hundreds of articles written about it.
History
The device was developed by Michael J. Freeman and installed in robot form in a New York City School in a fourth grade class, as an assistant built for Michael's wife, the teacher Gail Freeman. It took 18 months and US$1,000 (equivalent to $7,950 in 2025) to design and build. The computer had biographical information of those students whom it was programmed to teach in addition to curriculum data.
Leachim remained active for three years from 1972 to 1975.
On June 12, 1975, Leachim was stolen while being trucked back to NY from a 1-hour appearance on The Phil Donahue Show. Despite an FBI investigation and a reward from Lloyd's of London, it was not recovered.
“Leachim” enters the record as synthetic speech device. Crown Archives preserves that source wording while asking what Leachim, Synthetic and speech can confirm, complicate or overturn.
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“Leachim” is worth following because a concise public description often conceals a longer documentary argument. Here, Leachim, Synthetic and speech provides the most credible route into that argument.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 16, 2026. The linked authority identifier is Q96387106. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2025, 1972 and 1975.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Leachim” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.