Low frequency sounds,and buildings.

You have to find the resonant frequency... then amazing things tend to happen.

Higher frequencies break glass..... lower frequencies cause bridges to oscillate and collapse.

Buildings I;m thinking are a bit harder to collapse with sound.... unless you create the sound with explosives....

In Nicola Tesla's biography, an incident is described wherein Tesla devised a mechanical oscillator out of a jewelry-box mechanism and attached it to a steel frame building that was under construction near his home. It took a few hours, but the workers were eventually were scrambling to safe ground when the entire building began to shake violently. Tesla then quietly removed the device and went home.

This same principle is why marching soldiers break step when they cross a bridge. It's the reason the clock on my wall buzzes when I play a 734Hz tone. It's why you have so much trouble judging your bass levels in a mix.

Newer construction, however, is designed so as to not have a single resonant frequency, in order to be more resilient to earthquakes. It's unlikely you'd be able to damage a modern building with sound unless it was extraordinarily loud.

And I wouldn't recommend trying. At 150dbSPL your eyes explode. At 180dbSPL your internal organs liquify.

Tesla is also said to have calculated how much dynamite it would take to destroy the entire planet, using sequential detonations timed for constructive interference at the earth's resonant frequency.

NoKey


We saw empty drinking glasses explode on the table, at meal time, once or twice, no sound heard, on different days. The fragments were small, and not sharp.

So, be careful.

Must of been either mega high freqs,or you have a ghost in the house :-)

bitflipper


In Nicola Tesla's biography, an incident is described wherein Tesla devised a mechanical oscillator out of a jewelry-box mechanism and attached it to a steel frame building that was under construction near his home. It took a few hours, but the workers were eventually were scrambling to safe ground when the entire building began to shake violently. Tesla then quietly removed the device and went home.

This same principle is why marching soldiers break step when they cross a bridge. It's the reason the clock on my wall buzzes when I play a 734Hz tone. It's why you have so much trouble judging your bass levels in a mix.

Newer construction, however, is designed so as to not have a single resonant frequency, in order to be more resilient to earthquakes. It's unlikely you'd be able to damage a modern building with sound unless it was extraordinarily loud.

And I wouldn't recommend trying. At 150dbSPL your eyes explode. At 180dbSPL your internal organs liquify.

Tesla is also said to have calculated how much dynamite it would take to destroy the entire planet, using sequential detonations timed for constructive interference at the earth's resonant frequency.

 
Yeah thats pretty nuts someone has actually tried this stuff out,and it makes sense what you say about resonant frequencies. Its a shame people can't use this knowledge in a postive way instead of potentially destroying the planet .Our hoover for example makes the worst high frequency sounds in the entire universe.  If I hide in the bathroom I can still feel the  fu?/?/?/?er  resonating in my skull. We've had the vuvuzlea fliter,I wonder if they can do the same for hoovers ?

The Kiosk Project

kev11111111111111

bitflipper


In Nicola Tesla's biography, an incident is described wherein Tesla devised a mechanical oscillator out of a jewelry-box mechanism and attached it to a steel frame building that was under construction near his home. It took a few hours, but the workers were eventually were scrambling to safe ground when the entire building began to shake violently. Tesla then quietly removed the device and went home.

This same principle is why marching soldiers break step when they cross a bridge. It's the reason the clock on my wall buzzes when I play a 734Hz tone. It's why you have so much trouble judging your bass levels in a mix.

Newer construction, however, is designed so as to not have a single resonant frequency, in order to be more resilient to earthquakes. It's unlikely you'd be able to damage a modern building with sound unless it was extraordinarily loud.

And I wouldn't recommend trying. At 150dbSPL your eyes explode. At 180dbSPL your internal organs liquify.

Tesla is also said to have calculated how much dynamite it would take to destroy the entire planet, using sequential detonations timed for constructive interference at the earth's resonant frequency.

 
Yeah thats pretty nuts someone has actually tried this stuff out,and it makes sense what you say about resonant frequencies. Its a shame people can't use this knowledge in a postive way instead of potentially destroying the planet .Our hoover for example makes the worst high frequency sounds in the entire universe.  If I hide in the bathroom I can still feel the  fu?/?/?/?er  resonating in my skull. We've had the vuvuzlea fliter,I wonder if they can do the same for hoovers ?

Yes Kev, I know what you mean about vacumn cleaners. I'm convinced that my Dyson produces sounds above 20Khz as my dog, who is a tough little fellow in all other respects, runs for cover every time it comes out for a bit of house cleaning

Same as our cat then, disappears quicker then speed of light when-ever its cleaning time...poor buggar lol !

Guitarhacker


The cat runs because in a former life (cats have 9 remember) some mean kid, thinking it was funny, sucked the cat's tail into the vacuum nozzle. The cat, not being a very intellegent creature, thought it was being eaten by a screaming steel alien, was forever traumatized. The dog saw this and may also have experienced this traumatic event as well,  in addition to hearing the harmonics above human hearing...which really freaks them out.

Hmm that would explain it then !