Sound Mirrors at Dungeness, Kent
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- Опубликовано: 27 янв 2018
- Paul "Scruffy" Martin lends his ear to some acoustic mirrors which are passive devices in Dungeness, Scotland and were used to reflect and focus (concentrate) sound waves. Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of outdoor sporting events. Pairs of large parabolic acoustic mirrors which function as "whisper galleries" are displayed in science museums to demonstrate sound focusing. Between the World Wars, before the invention of radar, parabolic sound mirrors were used experimentally as early-warning devices by military air defence forces to detect incoming enemy aircraft by listening for the sound of their engines. During World War 2 on the coast of southern England, a network of large concrete acoustic mirrors was in the process of being built when the project was cancelled owing to the development of the Chain Home radar system. Many of these mirrors are still standing today.
These were featured on the TV show Abandoned Engineering.
These structures are still very useful as all you need are improvements on audio hardware and/or software to increase sensitivity from todays microphones pointed at the right curves of the parabolas.
fantastic
An interesting piece, but it's Kent not Scotland.
Yes, but it does sound like a Scottish placename.
Dho
I am here right now
Where are you here?
@@OfficialSheffieldCouncil I was here last year guys was a brilliant experience, didn't get to go up close due to not being able to cross over the water but was privileged to get as close as I did
At 3:17/5:57 The cinematographer Shows us electrical wires, not telephone lines.
XXIst century, but brits still use feets, fingers, inches, stones, pounds, fathoms, miles, gauges, ounces, pints, acres, hands, yards, roods, rods and other non metric nonsenses.
K. Your on American technology.
Next.
Yes we do 🙂And if people don't like it then they don't have to come here, it's their choice.
@@ZiggySearchfieldCactus
Don't be funny, mister. These things even are NOT yours.. Read some history, darling. Those units of measurement are roman, - NOT british.
And yes - Sadiq Khan with Muhamad Mugabe made their choice (to live in british country among fair white chicks).
@@sakoupa Yes, we absorb most things that come here, we took a lot of things from the Norman invaders too 🙂
@@ZiggySearchfieldCactus
You absorbed italian (roman) things few thousands years ago, and you haven't been able to learn anything new.. Now you absorb vodka and drugs. And yes, - you failed to "absorb" normans' french language (no way)... You *even* can't absorb your own language in Shakespeare's and George MacDonald's best style... It's sad.
Really pisses me off to see graffiti on NATIONAL MOMUMENTS in Britain's only Desert. Them punks have no respect!