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SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
31–40 of 77 posts
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#32A magnet in a coil operates both ways, this is non intuitive but perfectly sound. Not sure if it's mentioned in the article but microphones can be speakers too...
I recall when I was a kid decades ago, being able to plug a speaker directly into the microphone jack and use it as a microphone, without any modifications whatsoever.
We could do the reverse too, plug a microphone into the speaker jack and hear sounds coming out from it.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#33[flagged]
I feel like this is the kind of hack that made early radio tech exciting to play around with. The basic parts are incredibly simple to assemble from scratch, so it feels like magic. Speakers and microphones are the same thing in reverse. And so on.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#34As a kid I accidently plugged a mic into the speaker port and was surprised that, when I put my ear close to the mic, I could hear the computer sounds! It made sense in hindsight, and since then I knew they are kind of functionally equivalent.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#35Earlier quoted context omitted.
This shouldn't be downvoted. Transducers being reversible is a neat and non-obvious thing.
It's probably downvoted because it sounds somewhat nonorganic.
Even with the em-dash. New account and other comments seem to be here-and-there. Maybe LLM with some editing after.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#36As a kid I accidently plugged a mic into the speaker port and was surprised that, when I put my ear close to the mic, I could hear the computer sounds! It made sense in hindsight, and since then I knew they are kind of functionally equivalent.
My first “electric guitar” as a kid was my acoustic with an earphone taped to the bridge and plugged to the mic in of my boom box.
It was also my first “fuzz pedal” because the sound never came out clean :)
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#37[flagged]
This shouldn't be downvoted. Transducers being reversible is a neat and non-obvious thing.
It's pretty obvious if you did high school physics. I experimented with earphones as microphones as a teenager but couldn't get any meaningful audio data.
I think they're being downvoted because their comments all seem to have AI features.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#38When I was a teenager I was friends with an extremely poor kid who literally lived on the wrong side of the tracks. He couldn’t afford a microphone and used an old pair of busted headphones to rap into as a microphone. He had recorded and produced a whole album like this with Fruity Loops on an old computer he found discarded at the side of the road.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#39Vault 7 from wikileaks confirmed that yes, the CIA is using this.
Re: SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit [pdf] (2017)
#40Some DJs use this principle when they need a hacky stage mic. They plug their headphones to the mixer's mic input, and shout to the speaker element.
E.g. this music video (evoking old Just Jam sets): https://www.youtube.com/watch?v=_xQKWnvtg6c
To really take it to that next level, snap the headphones in half when you get up on stage for a lollipop. Even seen one bring a corded phone and cradle to a set.