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The acoustic mirror on Namey Hill is a First World War defensive structure designed to detect approaching enemy aircraft through sound amplification. Constructed during the latter stages of the war when aerial bombardment posed an increasing threat to British installations, the monument exemplifies early warning technology developed before the advent of reliable radar systems. The structure consists of a concrete reflector positioned to concentrate and direct sound waves toward a listening apparatus, allowing observers to identify and track aircraft at distance. Located north of Carley Hill Cricket Ground in Durham, the site remains an important surviving example of experimental acoustic defence infrastructure from the 1914–1918 conflict.
First World War early warning acoustic mirror on Namey Hill, 570m north of Carley Hill Cricket Ground is a scheduled monument protected by Historic England under reference 1020325. View the official record →
The acoustic mirror on Namey Hill is a First World War defensive structure designed to detect approaching enemy aircraft through sound amplification. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1020325.
First World War early warning acoustic mirror on Namey Hill, 570m north of Carley Hill Cricket Ground is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1020325.
Several scheduled monuments lie within 10 km, including Monkwearmouth Anglo-Saxon monastery and medieval priory (2.2 km), Hylton Castle: a medieval fortified house, chapel, 17th and 18th century country houses and associated gardens (3.2 km), Lizard Lane Heavy Anti-Aircraft Battery (4.2 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of First World War early warning acoustic mirror on Namey Hill, 570m north of Carley Hill Cricket Ground's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
First World War early warning acoustic mirror on Namey Hill, 570m north of Carley Hill Cricket Ground stands on Zechstein Group, bedrock that formed in the Late Permian. The rock here is dolomitised limestone and dolomite.