The Original Worlds Loudest Whistle up to 142db Loud, Very Long Range, for Referee, Coaches, Instructors, Sports, Teachers, Life Guard, Self Defense, Survival, Emergency uses

Have used this whistle when camping in PNW to scare off a black bear drawn to cooking at my campfire. It’s such nice peace of mind I keep it in my hiking gear permanently. I’ve not tried it in water yet, honestly it’s so loud I wouldn’t use it unless absolutely necessary, but highly recommend to scare off threatening wildlife and think it could be valuable in a rescue situation.The product itself is a durable kind of plastic? About the size of a small bottle of hand sanitizer. Sturdy strap.

I'll start by saying, do not be like me; this is not something to foolishly test out indoors, because, you easily run the risk of making yourself deaf, or, at least having some serious hearing damage. Don't be like me, and use this inside, as excited as you, rightfully, are, to test this the second it is delivered.I read, for a long time, what the "world's loudest whistle" was, and, found out about the Hyperwhistle. I can say, as the headline suggests, that this fits that bill, and then some.Pros:- This is easily the loudest whistle you can buy, so it is suitable for all sorts of applications.- Price is fantastic for what you get.- I tested this, on a long, pier, which is in a very rural area, with a friend, and the claims about distance, are accurate, if not a bit undersold; this could easily be heard much further away.- Does not require an immense amount of lung power to use, whilst still being ear-piercingly loud.- Unbelievably durable/well crafted - I wish more plastics/polymers were made to this standard, or, all were. This whistle can take a fall onto concrete from 3 stories, and it can be left outside (neither of those are anything I'd recommend), for 4 days straight, in a predominately saline environment, which does a good job at least tarnishing almost anything in less time, and, this shows NO signs of damage or anything; it looks brand new still after all of that.Cons:- I have absolutely nothing negative to say about this, and I have tried to find something....- It isn't a "con", but, it sure would be nice, if this had the "NHL referee style" two finger ring guard, somehow implemented on future designs, or perhaps a variant product. The lanyard can do that job as well though.All said, this is a very very very, loud, whistle. I could see this being easily used for a means of self-defense, that would alert literally anyone, and buy someone time to escape whatever danger they are in. If more lifeguards had this - maybe they do use these, no idea personally - that also would be a very effective and affordable way to save lives, and, again, alert anyone on a beach. This is something that I would suggest anyone who wants to go hiking, or is into ANY form of exploration, be it nature, urban, etc. to have with them, as it really is tough enough to withstand anything, it CAN be used underwater (tested this myself, and even remembered to use earplugs), and, well, to avoid being more redundant, this could easily save your life, and it is so well made, that I've already been suggesting this to other people.I have nothing negative to say about it at all, because it's got the perfect price point for the quality, and accurate, if not modest, claims they make in their advertising for the product.10/10 - 5/5 Stars - Excellent product, which I HIGHLY recommend!- RevengeOfThePiff

This whistle, more of a screamer, is LOUD. Of course, that depends on how hard you blow through it. You can get a very simple, sharp and quiet whistle, or alert the entire neighborhood within a 2 mile area if you really push some air through it. It’s great and my kids love it. In fact, I stood 1000ft away and blew through it, they looked at me with binoculars, and as I blew the whistle, I would raise my arms. It was a lesson to show them how light travels faster than sound so they saw my hands go up before they heard the whistle. Just be careful, like I said, it’s loud, so be aware of your surroundings when letting this thing screech.

EDIT: After reviewing my original review, I want to clarify a few things. First off I seem to have rambled about some things that may or may not matter. I kept the review posted since there is a few things you may pull from the information that are worthwhile. As far as the whistle goes, it’s loud enough to make you not want to use it lol! It hurts the ears for sure. It’s unfortunate the design isn’t made in a way that somehow directs the sound forward, but it surly will get the attention of anyone around you, or in the event of an emergency, those who are far away. I think for what it is, it’s a great device. I would give it 5 stars except for the simple fact that it hurts to use without ear protection. By no means should you skip on this for it’s intended use, but it would be nice if it projected sound forward so you could use it without ear protection and without the risk of damaging your ears. You want to scare the poop out of someone? Use this whistle around them without first giving them notice. You want to break up a fight? One deep breath and an exhale into this thing is and you’ll stop most people momentarily from doing what they are doing. You want to get the attention of an audience of people without the use of a microphone or shouting at the top of your lungs? This plastic whistle is your tool. It’s amazing the amount of noise such a small whistle can produce. Just buy it, you won’t be disappointed, but it might leave you with a hearing problem!The hyper whistle is ok, but it’s basically three whistles combined into one. There’s not really any ingenuity here beyond the combination aspect. Also, what’s stopping someone else from making the same whistle with say 4 ports or 5, possibly making it even louder. Speaking of, it’s loud for sure, but the curvature of the whistle makes the sound bounce back at the user rather than projecting forward. For as big as it is (and understand I may not fully comprehend the engineering of this whistle) why didn’t the manufacture just shape the cut outs toward the front, even if it added a little material. There is absolutely blowback here, this is why they send you a pair of 3M earplugs and recommend ear protection. Kind of a dumb repercussion to the user; hey here is the world’s loudest whistle but it’s going to damage your own ears in the process… It’s the equivalent of having an air horn that would spray sound in all directions rather than having the funnel so that the user may direct the sound.I purchased this whistle to scare or possibly intimidate dogs as a first line of defense. I do not have enough data to support the idea that this works, but I know it hurts my ears when used so I would suggest that it would probably deter some dogs for sure. The lanyard is excellent, I can wear this all day and forget it’s around my neck. Overall Hyperwhistle is onto something here but it needs to be refined honestly and then this would be an excellent product!

Extremely loud. Great product.

As touted by their marketing and the price point, I was expecting something loud. It’s not as loud as the storm whistles and they come in a pack of 4 for the same price. Build quality ot there and it appears robust.

Wow this thing is loud

Loudest whistle ever...Ear plugs required when using it...Motorists responses are great