ORGANIZATION
Harvard Psycho-Acoustic Laboratory
The wartime and postwar research facility at Harvard where Licklider spent formative years studying how the human auditory system processes complex signals — the intellectual training that equipped him to think about human-machine coupling.
The Psycho-Acoustic Laboratory was established at Harvard in 1940 under S.S. Stevens, initially to address military communication problems. Licklider joined the lab during the war and stayed through the late 1940s, conducting research on speech intelligibility in noise, auditory perception, and the mechanisms by which human attention selects meaningful signals from complex acoustic environments. The training shaped his later computing work in ways that are visible in the functional vocabulary of Man-Computer Symbiosis — channels, bandwidth, signal-to-noise, filtering — but also in the deeper conviction that human cognition is not a logical operation on discrete inputs but an embodied, contextual, filter-driven process.
In The You On AI Field Guide
The lab's wartime work on speech intelligibility — how to design communication systems that worked reliably in the cacophony of aircraft, submarines, and battlefields — established an engineering tradition in which the human receiver was modeled as a component of the communication system rather than an external user of it. This framing, systemic