Also from what I’ve seen online some of the gas pumps have switched from conventional speakers to DML panel speakers so you can’t destroy the speaker cones.
We need a commercial point of sale sabotage manual. Like we need to comb through the repair manuals for all these things, all these advertising machines, and determine how they can be disabled quickly, quietly, and with minimal evidence by the “end user”.
That’s one of the reasons some advertising and ATMs have switched to panel speakers, there’s no requirement for vent holes for the sound to escape, so it’s pretty much impossible to vandalise. A physical part of the gas pump or ATM becomes the speaker, by being energised by an audio exciter stcuk to the back side of it. If you see something producing sound with no obvious speaker holes, it’s probably using a DML exciter. It’s actually a very interesting technology, a shame it’s being used in advertising.
That could make it louder. I’ve built my own set of DML panel speakers, and coating the outside of the panels in a coat of PVA glue enhanced the high frequency sound. If there’s good connection between the epoxy and the surface, and the exciter is powerful enough to energize it with the extra mass of the epoxy, it will still work. Some people even coat their panels in expoy to try enhance the sound in a similar manner to coating in PVA glue. You would have to get the epoxy jammed in on the side with the exciter, which is usually not accessible.
yeah, I genuinely thought about trying to figure out where the essential components of those were so I could pop a little hole in them with a drill but I decided to stop driving for like a year instead
If you put your ear next to the panel you can probably find the location of the exciter on the panel, as the noise will get louder closer to the exciter, and then drill though the panel and exciter.
the only unfortunate thing is that essentially all gas stations have cameras
but honestly they aren’t monitored well at night so maybe you can get away with it if you’re casual enough. or black out your plates. Hardly seems worth the risk but those things make me homicidal so
Also from what I’ve seen online some of the gas pumps have switched from conventional speakers to DML panel speakers so you can’t destroy the speaker cones.
We need a commercial point of sale sabotage manual. Like we need to comb through the repair manuals for all these things, all these advertising machines, and determine how they can be disabled quickly, quietly, and with minimal evidence by the “end user”.
That’s one of the reasons some advertising and ATMs have switched to panel speakers, there’s no requirement for vent holes for the sound to escape, so it’s pretty much impossible to vandalise. A physical part of the gas pump or ATM becomes the speaker, by being energised by an audio exciter stcuk to the back side of it. If you see something producing sound with no obvious speaker holes, it’s probably using a DML exciter. It’s actually a very interesting technology, a shame it’s being used in advertising.
Surely slathering the surface with two-part epoxy would stop it from making noise?
That could make it louder. I’ve built my own set of DML panel speakers, and coating the outside of the panels in a coat of PVA glue enhanced the high frequency sound. If there’s good connection between the epoxy and the surface, and the exciter is powerful enough to energize it with the extra mass of the epoxy, it will still work. Some people even coat their panels in expoy to try enhance the sound in a similar manner to coating in PVA glue. You would have to get the epoxy jammed in on the side with the exciter, which is usually not accessible.
Fascinating. Truly unfortunate that this tech is being used for evil.
Exactly where my head went, but with expanding spray foam to get in and out quickly. Don’t know if that would even defeat these panels though.
it would probably fuck up the resonance and bring the level down at least
yeah, I genuinely thought about trying to figure out where the essential components of those were so I could pop a little hole in them with a drill but I decided to stop driving for like a year instead
If you put your ear next to the panel you can probably find the location of the exciter on the panel, as the noise will get louder closer to the exciter, and then drill though the panel and exciter.
the only unfortunate thing is that essentially all gas stations have cameras
but honestly they aren’t monitored well at night so maybe you can get away with it if you’re casual enough. or black out your plates. Hardly seems worth the risk but those things make me homicidal so
Putting a strong magnet next to the location of the exciter will screw it up without any physical damage from the outside.
I was wondering about that. Like would a fishing magnet be strong enough? Those are pretty strong and easily concealed.