Lrad speakers
Art by Jon McCormack. But this ear-splitting device has also been fired on protesters across America, resulting in lawsuits and permanent hearing loss. Subscribe to our Youtube channel here. Become a monthly contributor at 20k. If you know what this week's mystery sound is, tell us at mystery. Just click the microphone at the top right corner and type the promo code 20k.
We are searching data for your request:
Lrad speakers
Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.
Content:
- How to Dodge the Sonic Weapon Used by Police
- Phoenix police pick up approval, $95K for long-range, crowd-control speakers
- Long Range Acoustic Device
- Explainer: LRAD -- What Is It And How Does It Work?
- 'Plug your ears and run': NYPD's use of sound cannons is challenged in federal court
- Recent Episodes
- How LRAD Works
How to Dodge the Sonic Weapon Used by Police
Art by Jon McCormack. But this ear-splitting device has also been fired on protesters across America, resulting in lawsuits and permanent hearing loss. Subscribe to our Youtube channel here. Become a monthly contributor at 20k.
If you know what this week's mystery sound is, tell us at mystery. Just click the microphone at the top right corner and type the promo code 20k. Compare home and car insurance rates at policygenius. Michele: So when it first started going off, I was genuinely kind of confused, like is there like a car alarm that's malfunctioning? Is there a fire alarm in a house right now?
Michele: And then I saw the tanks being driven in [SFX: tank driving] and them moving that big flat platform. Now, Michele had been to protests before. She had been hit with pepper spray and heard flash grenades. But she had never experienced anything like this. Michele: It's a weird feeling, and it kind of vibrates your whole head. My friend Gabe said he could feel it in his chest almost, that it was just so heavy. Michele was standing near the front of the crowd, about forty feet from where the sound was coming from.
She thought about running away, but she fought through it. Michele: I physically made myself plant myself in where I was. But I wanted to get away and I wanted to leave. And I held my hands over my ears a lot, or plugged my ears a lot, or tried talking while it was going on. Michele: The flash bangs [SFX] were really, really scary, because you couldn't really differentiate between what was what. It was terrifying. It sounded like a war zone. Michele stayed at the protest until about two in the morning, and when she finally left, the sound came with her.
Michele: I only left because I was exhausted and I was in pain. Michele: I didn't even notice how bad it was until I was in silence. And my ears were just ringing, [SFX: ringing gets louder] I thought that something was wrong with my car. It was really bad. And it went on for a good like week, like six, seven days.
Lynne: It is basically, well, it depends who you ask. That it's just a long range communications device, specifically. If you ask someone who has been in the direct line of an LRAD, especially at close range, they will tell you it's a sound weapon or a sound cannon. An LRAD has two functions: The first is the voice function, which is basically a really strong megaphone that blasts a voice in one direction.
Lynne: It's the same technology, it's just a really, really loud sound. That's the alarm. No one has a problem with long range communication. A regular loudspeaker scatters sounds in many directions, kinda like how a lightbulb shines light everywhere. But an LRAD blasts a sound in just one direction—like a beam from a super powerful flashlight. Lynne: I think a flashlight is a pretty good way to think of it because what's special about it is just the casing around the flashlight, right?
You can have an ordinary bulb, but in order to make the light from the bulb go in one direction, it needs to be set in something that's reflective, and will sort of squeeze the cone of energy that it's sending out until it's more narrow. Lynne: Really, it's just a really simple physical design. A sound engineer I talked to called it a brute force design. It's like, how do we make this as loud and as painful as possible?
The sound is loudest directly in front of it, but it can easily be moved around. Michele discovered that pretty quickly. Michele: I kept moving within the crowd.
And then as soon as they pulled it towards the middle, it was very slight. This is from a special on CNN:. The suicide mission using a small boat and hundreds of pounds of explosives. In response to the attack, the Navy wanted a tool that would allow them to better communicate with approaching vessels.
Lynne: So the idea is to communicate at such a distance that you would be able to send a clear message, and then judging by the response of the potential enemy, you would know whether to fire. As intended, the LRAD was perfect for communication at sea. It could transmit sound over two miles across the water, so ships could hear it even without a working communication system.
But the designers quickly realized that LRADs could be useful in other situations, and started selling them for a range of uses. Some fire departments use LRADs as a mass notification system during wildfires. A few years ago, after a deadly wildfire in California, some towns bought LRADs to replace their air raid sirens.
This is from an ABC special. LRADs can be useful in all kinds of natural disasters. They can be used to send shelter in place or evacuation orders, to communicate with people who are stranded, and to help find people in search and rescue situations. And that is what's so dangerous. Volume is measured in decibels. A normal conversation is about 60 decibels. A loud motorcycle [SFX: motorcycle] might be around a hundred decibels. An important thing to note here, is that on the decibel scale, the loudness doubles approximately every 10 decibels.
So 70 decibels is twice as loud as 60 decibels, 80 decibels is twice as loud as 70, 90 is twice as loud as Any sound over decibels can cause pain and hearing loss. Lynne: People who have witnessed that, witnessed people being too close to one, say that some people just fall down because they're in so much pain. You forget which direction you should go. And injuries like this have led to legal action.
Other countries started buying them too, and so did US cities, fire departments, and police departments. People in favor of LRADs argue that it lets officers communicate, and clear out crowds without using lethal force. But this tone is more than just annoying—it can cause migraines, nausea, vertigo, confusion, and permanent hearing loss.
When police officers use an LRAD, they sometimes just use the voice function… which again, no one really takes issue with.
If you do not do so, you will be arrested. You must remain on the sidewalk. If you do, you will be placed into custody. That sound is meant to cause enough discomfort that it breaks up crowds, kind of like auditory tear gas. But just like tear gas, bystanders can be vulnerable, too. Here she is describing the experience to the ACLU:. And I immediately felt a pain in my ears and I ran away.
And then I just felt dizzy and nauseous and I felt this horrible headache and one of my ears was worse than the other, and there was fluid coming from it I noticed. As a result, Karen suffered permanent hearing damage, and decided to file a federal lawsuit. A similar case happened in New York. The city of New York attempted to have the case thrown out. Lynne: Sound is movement, so if you hear a sound, that means something in your inner ear is moving because of the movement of molecules in the air.
So the danger with any exposure to overly loud sounds is that those inner ear parts, which are extremely sensitive and delicate and really difficult for the body to repair, will be permanently damaged by that movement.
That they'll move so quickly and with such energy that they'll essentially break. The higher the volume, the more force is hitting your eardrums, and the more quickly it can cause damage. But hearing damage can be hard to prove. Lynne: Some of the dangers of loud noises are not things that are visible to doctors, [SFX: tinnitus sfx] including tinnitus, which is when you hear that ringing in your ear, but a medical case of tinnitus would be something that lasts much longer [SFX: tinnitus fade out].
So it's something that can be really distressing, but is totally internal on a physical level, which means, it's easier for people to argue that it's not real, which definitely works in favor of people who would like the LRAD to not be regulated like a weapon.
The LRAD is just one of many controversial military weapons that police use. Flash grenades produce a blinding flash of light, and a sound of up to decibels [SFX]. All of this leaves a lot of people asking how and why police have access to things that are designed for use in war.
The ways that police get access to military technologies are numerous. One of the most famous is the Federal Program, which basically lets police just sort of lease, or buy for a low cost, or sometimes just receive for free, surplus equipment from all branches of the military. The Program was created in the 90s, to get rid of extra military equipment, and to help police departments fight the war on drugs.
Weapons that can be transferred through this program include bayonets and grenade launchers. Over the years, the program has been rolled back, then reinstated, then rolled back again.
Phoenix police pick up approval, $95K for long-range, crowd-control speakers
Bullets, missiles and swords may be what most people think of when it comes to weapons, but sound has also been deployed over the millennia to disrupt, confuse or even injure opponents on the global battlefield. From the Israelite army of trumpet-blaring priests who shook the walls of Jericho 3, years ago to the U. Most sound has been weaponized to disorient or anger opponents. In Vietnam, U.
Long Range Acoustic Device
By: Tracy V. In November , pirates attacked the cruise ship Seabourn Spirit off the coast of Somalia. The pirates were in a small boat, but they had machine guns and rocket-propelled grenades. Some of the coverage was pretty dramatic. News stories described the LRAD as a sonic weapon that fired a beam of sound at the pirates and drove them away. What makes sound a weapon? In this article, we'll review the basics of sound and discuss exactly how the LRAD produces its "beam of sound.
Explainer: LRAD -- What Is It And How Does It Work?
The Ministry of Defence has confirmed a sonic device will be deployed in London during the Olympics. The equipment was spotted fixed to a landing craft on the Thames at Westminster this week. The manufacturer denies it is a weapon and the MoD said it would be used "primarily in the loud hailer mode". A spokesman for the San Diego-based LRAD Corporation said the Xi was "an effective long range communications system that broadcasts focused, highly intelligible, multi-language messages, instructions and warnings over distances up to 3, metres to peacefully resolve uncertain situations". Royal Marines operating in patrol craft from HMS Ocean are also heavily armed with conventional firearms.
'Plug your ears and run': NYPD's use of sound cannons is challenged in federal court
The LRAD sound is an uncomfortable audible deterrent tone that travels very long distances within a narrow beam of focused soundwaves. The warning tones produced by the LRAD are in the normal audible range of hearing and driven by multiple high-efficiency audio mid-range compression drivers. The focused beam of sound is possible through a unique design that combines folded horn speakers within a large parametric array. Add the directional nature of the design of the device, and you have a very effective tool for maintaining law and order. This unique audio system is considered a non-lethal weapon for this reason. It is a practical and safe alternative to more dangerous methods generally used for crowd control.
Recent Episodes
Beijing Topsky Automatic Technology Co. Our main products include portable gas detector, Ventilation Meter, breathing apparatus, Oxygen Self-Rescuer, Water mist system, Pneumatic Chain Saw and related products. Our company was established in , and we have many years of history in the coal mine and fire fighting industry. Located at Beijing, we enjoy convenient water, land and air transportation. Our company employs many experienced technical and management personnel. Through the efforts of all staff , we have become a special safety equipment manufacturer. All of our staff have continuously tried to improve product quality and service for the user's safety. Currently, our product was already exported to America, France, Australia, Italy and 20 other countries and regions.
How LRAD Works
Just as activists have raised their voices demanding justice for George Floyd and the many killed by police violence, the police have met them with their own sound: the LRAD. Genasys, manufacturers of the LRAD, issued a press release touting its use by police departments in seven cities during the protests of the last week, including Portland, Ore. Protesters and journalists have reported their use in cities like Chicago and New York on social media.
The Model XI Integrated System is a power efficient, long distance communication system designed for applications ranging from critical infrastructure protection to coastal waters, border and port security, and large vessel and The Model X Portable Hailing System is a self-contained, hand-held, portable communications device for use in on-scene and tactical communications. It has the capability to be 20? The Model X Long Range Communication Device uses an extended frequency range to safely and effectively communicate directional audio broadcasts with superior voice intelligibility and clarity far beyond normal stand distances. The Model X-RE Low Profile Communication Device is low profile, lightweight and designed to secure on a tripod mount configuration, small vessels, vehicles and remote weapon stations RWS , as well as being used throughout the The Model X Mass Notification System is a stackable emitter that broadcasts a highly intelligible voice and warning siren broadcasts with uniform
Activists describe this heavily militarized area as a communications dead zone. Journalists and NGO workers struggle to access it and refugees trying to cross regularly have their phones confiscated by police. But some videos do escape through the cracks. Including desperate pleas from people stranded on islands in the middle of the river and grainy, seconds-long footage from inside government-run detention centers. In May, Greek police staged a press call near the border town of Feres to proudly show off their latest technological acquisition. Mounted on a vehicle, it looked like a large, grey tannoy — a little bigger than a megaphone, equipped with dials and colored buttons. Wearing earplugs, a police officer grabbed its handles and moved the device in different directions as it emitted a piercing alarm sound.
But he was lucky. Confronted with an unprecedented global movement against police violence and racial injustice , U. These devices vary in appearance and size, but every model has the same two capabilities. Military officials asked the LRAD Corporation now Genasys for a device with two functions: to communicate at a distance with potential threats, and to disperse them with an unbearable alarm-like sound.
Question deleted
What a useful argument