3) Diffusion. That is, the sound hitting an irregular surface, generating a mass of reflecting waves that all phase through each other to cancel each other out.
4) Absorption. That is, using a surface that is porous and has holes in it that allow that sound in, but containing so much density that the sound doesn't pass through to the other side and is simply dispersed as heat energy.
The sound of LRAD is emitted from between 2000-3800 Hz, at 165 decibels. It is a broad spectrum sound.
Foam earplugs have their memory foam properties by having completely uniform bubbles, allowing for a flexible scaffolding with the self-support to realign itself after being crushed. These bubbles in foam earplugs' precise size allows for effective absorption of sounds at precisely the 4000 Hz range.
LRAD will not only readily pass through the foam, but may even deflect on the inside of the ear canal, worsening the pain it causes. in order to lower the range of decibels of LRAD to a level that wont cause permanent deafness within 30 feet, you need to be able to reduce the decibels by around 45 dB which, will put it to around the same loudness as a gas lawnmower.
4) Absorption. That is, using a surface that is porous and has holes in it that allow that sound in, but containing so much density that the sound doesn't pass through to the other side and is simply dispersed as heat energy.
The sound of LRAD is emitted from between 2000-3800 Hz, at 165 decibels. It is a broad spectrum sound.
Foam earplugs have their memory foam properties by having completely uniform bubbles, allowing for a flexible scaffolding with the self-support to realign itself after being crushed. These bubbles in foam earplugs' precise size allows for effective absorption of sounds at precisely the 4000 Hz range.
LRAD will not only readily pass through the foam, but may even deflect on the inside of the ear canal, worsening the pain it causes. in order to lower the range of decibels of LRAD to a level that wont cause permanent deafness within 30 feet, you need to be able to reduce the decibels by around 45 dB which, will put it to around the same loudness as a gas lawnmower.
#MexicoCity - International solidarity continues to spread! https://twitter.com/alexsalvinews/status/1269023553208422400
Twitter
Alex Salvi
The U.S. embassy in Mexico City is on lockdown after rioters threw rocks and molotov cocktails at the building as they protest police brutality in the country. https://t.co/kU6UHSYiBK
#Portland - hefty deployment of pepper balls and tear gas from riot police as per Robert Evans' stream, included in this multistream, live right now: https://www.twitch.tv/woke
Twitch
WOKE - Twitch
01/24/26 - ICE Raids Protests Nationwide - WOKE.NET
Forwarded from Washington DC BLM Protests
A warning to be careful with real names on Telegram. If this heats up, it could be dangerous to have your activities tied to your identity.
Forwarded from /r/Mapporn
Mapping every George Floyd / Black Lives Matter protest: 1,369 towns and rising! Help me out!
https://creosotemaps.com/blm2020
https://redd.it/gxg57j
@r_mapporn
https://creosotemaps.com/blm2020
https://redd.it/gxg57j
@r_mapporn
Mission Uncrossable – Free Demo Casino Game with Fake Money
Play Mission Uncrossable, a thrilling casino game. Try the free demo with fake money and explore exciting features before wagering for real rewards.
Boycott Amazon
https://truthout.org/articles/amazon-says-black-lives-matter-but-its-helping-fund-police-foundations/
https://truthout.org/articles/amazon-says-black-lives-matter-but-its-helping-fund-police-foundations/
Truthout
Amazon Says Black Lives Matter, But It’s Helping Fund Police Foundations
One of Amazon's charitable arms helps fund police foundations that purchase surveillance equipment and weaponry.
A comrade sent us this!
"We've been using telegram for years for political activists, and I'd be happy to share the experience with you guys. So here are my thoughts if you find it helpful, share them with your community"
How to secure your telegram communications?
https://telegra.ph/Telegram-101-How-to-communicate-Securely-in-Telegram-06-06
A little more tips for admins of groups and channels
https://telegra.ph/A-guide-for-admins-and-organizers-of-Telegram-communities-06-06
"We've been using telegram for years for political activists, and I'd be happy to share the experience with you guys. So here are my thoughts if you find it helpful, share them with your community"
How to secure your telegram communications?
https://telegra.ph/Telegram-101-How-to-communicate-Securely-in-Telegram-06-06
A little more tips for admins of groups and channels
https://telegra.ph/A-guide-for-admins-and-organizers-of-Telegram-communities-06-06
Telegraph
Telegram 101: How to communicate Securely in Telegram?
It’s no secret anymore that we are living in age of highly sophisticated government or big firms’ surveillance from everyday life of ordinary citizens; and political and social activism is even further their prime target. We came a long way and learned a…
This is the youtube channel of the 75-year-old guy who was knocked on the ground by the Buffalo Police. Consider showing this sir some support
https://www.youtube.com/user/MartinGugino
https://www.youtube.com/user/MartinGugino
YouTube
Martin Gugino
Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Forwarded from Syndiegram (Prof. Honorius 🏳️🌈🏴☠️🏳️⚧️🌻🦡 Older but no wiser)
YouTube
LRADs and Sound Cannons Are NOT Safe. Here's How To Minimize Their Effects.
If the police or military are aiming a LRAD at you, LEAVE THE AREA IMMEDIATELY TO PREVENT PERMANENT HEARING DAMAGE.
I've had to hold all comments for review due to the amount of racism and trolling showing up this morning. I'm also being threatened legally…
I've had to hold all comments for review due to the amount of racism and trolling showing up this morning. I'm also being threatened legally…