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Just after sunrise on a misty spring morning last year, my fellow acoustician at the University of Salford, Bruno Fazenda, and Rupert Till of the University of Huddersfield, UK, could be found wandering around Stonehenge popping balloons. This was not some bizarre pagan ritual. It was a serious attempt to capture the "impulse response" of the ancient southern English stone circle, and with it perhaps start to determine how Stonehenge might have sounded to our ancestors.
An impulse response characterises all the paths taken by the sound between its source – in this case a popping balloon – and a microphone positioned a few metres away. It is simply a plot of the sound pressure at the microphone in the seconds after the pop. The first, strongest peak on the plot represents the sound that travelled directly from the source to the microphone. Later, smaller peaks indicate the arrival of reflections off the stones. The recording and plot shows the impulse response Bruno and Rupert measured with a microphone positioned at the centre of Stonehenge and a popping balloon at the edge of the circle.
Researchers are uncovering the secrets of ancient civilizations which built fun house-like temples that may have scared the pants off worshipers with scary sound effects, light shows and perhaps drug-induced psychedelic trips.
The emerging field of acoustic archaeology is a marriage of high-tech acoustic analysis and old-fashioned bone-hunting. The results of this scientific collaboration is an new understanding of cultures who used sound effects as entertainment, religion and a form of political control.
Miriam Kolar, a researcher at Stanford University's Center for Computer Research and Acoustics, has been studying the 3,000 year-old Chavin culture in the high plains of Peru. Kolar and her colleagues have been mapping a maze of underground tunnels, drains and hallways in which echoes don't sound like echoes.
Originally posted by LDragonFire
Just after sunrise on a misty spring morning last year, my fellow acoustician at the University of Salford, Bruno Fazenda, and Rupert Till of the University of Huddersfield, UK, could be found wandering around Stonehenge popping balloons. This was not some bizarre pagan ritual. It was a serious attempt to capture the "impulse response" of the ancient southern English stone circle, and with it perhaps start to determine how Stonehenge might have sounded to our ancestors.
An impulse response characterises all the paths taken by the sound between its source – in this case a popping balloon – and a microphone positioned a few metres away. It is simply a plot of the sound pressure at the microphone in the seconds after the pop. The first, strongest peak on the plot represents the sound that travelled directly from the source to the microphone. Later, smaller peaks indicate the arrival of reflections off the stones. The recording and plot shows the impulse response Bruno and Rupert measured with a microphone positioned at the centre of Stonehenge and a popping balloon at the edge of the circle.
Acoustic archeology: The secret sounds of Stonehenge
Originally posted by iamahumandoing
reply to post by hawk123
Whoops, obviously I need to search better before I make a leading observation about something haha... My threads must've died for a reason (being ****).
Those are excellent threads there that you have linked to - I think that if C is 528hz, then A on the same scale is 432hz, I think. It's amazing really that A440hz became mainstream and still is when we're presented with this evidence.
Thanks again for the linksedit on 4/2/11 by iamahumandoing because: grammar