Recent comments in /f/gadgets

king_zulufo t1_iy3jr4w wrote

Reply to comment by zenith_industries in LG Display’s ‘invisible’ speaker brings sound to any surface in your car by MicroSofty88

If I'm understanding these speakers correctly this is just old tech being rehyped under a new brand. They're basically normal speakers but replace the "black circle paper resonator disc"(idk it's real name) with a suction cup. And now you can stick it to any surface and just resonate that be to make your sound... it sounds like absolute shit on %95 of surfaces. It turns out most objects have very clear resonating frequencies and every time the speaker would play those It would be much louder making it sound very tinny.

I could definitely see a company adding a microcontroller and microphone to try and real time create an equalizer to mitigate this, and it might work and might be what was done here.

Also there is a YouTube channel called tech ingredients. The main guy like to talk long and dry but he gives out good info. He did a video where he took super cheap resinator speaks and tested a bunch of different materials and shapes of what to stick it to for the best inexpensive sound. Resulting in an amazing tutorial on how to make loud diy very high-fi speakers for about 30$

https://youtu.be/zdkyGDqU7xA

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Tigen13 t1_iy3j595 wrote

Reply to comment by gramathy in News Release: NREL Creates Highest Efficiency 1-Sun Solar Cell - 39.5% efficiency by TimeSpentWasting

I am not a firefighter nor do I have experience in the biz. I just don't see why a firefighter would ever want to walk on a roof in a bad fire. Every room has a window and provides better access to a fire without endangering a firefighters life. The roof is one of the most dangerous places to be in a fire because if the fire has weakend the roof the firefighter could be a step away from falling to their death. It's much safer to hang the ladder over the roof and spray from there.

Anyway, dumb code in my opinion which is why it isn't the norm.

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callebbb t1_iy3hmi4 wrote

Reply to comment by k0bra3eak in News Release: NREL Creates Highest Efficiency 1-Sun Solar Cell - 39.5% efficiency by TimeSpentWasting

FTX is a perfect example of the folly of man. People took a decentralized money, where no trust in counter parties is necessary, and put it back in the centralized box.

FTX was a scam pretending to be an exchange. Ultimately, the users who withdrew their Bitcoin the moment it was purchased were unharmed.

A failure, no doubt, but not due to Bitcoin. It’s also not the first time this has happened. It will happen repeatedly, until people realize Bitcoin is a bearer asset, and they must take custody of their own money.

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shouldbebabysitting t1_iy3fy1x wrote

Reply to comment by alt4614 in LG Display’s ‘invisible’ speaker brings sound to any surface in your car by MicroSofty88

Except speakers are smaller than the empty space already required to exist in cars.

You have to have front crumple zones and side windows that go up and down. That leaves empty space which is filled by speakers. Switching to a smaller speaker doesn't change the space required for a door window. (Because the door window doesn't and can't fill the entire door frame when lowered.)

The front crumple zones leaves space under the windshield in the dashboard. This is unused space that can't be filled with anything massive. But speakers are mostly thin metal and paper. So they can go into crumple zones where nothing else can.

A smaller speaker means more empty space inside the frame. It can't save space.

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