Noise Detector - 17 x 5 1/2 x 5 inch

I put it in my busy veterinary clinic. The staff is crazy offended but the noise level has come down.

Works well In a noisy classroom.

This stop light is exactly what I was looking for. I teach k - 6 and I can adjust the green level to fit each grade. The siren could be a little louder but its still great. My one complaint is that the buttons stick making it difficult to turn on and off. Hoping this does not get worse.

I really like mine. I am an art teacher. The only reason I did not give it 5 stars is bc I see two "minor" flaws with the product.1.) many reviews are correct in stating that it is too sensitive at one setting and not sensitive enough at another. 50 decibels is the lowest setting. This is about the noise level of a library. 60 decibels is the next setting and 70 the next. I have to keep it set at 70 decibels bc 60 is far too sensitive but at 70 decibels it doesn't seem to be sensitive enough so it still ends up getting pretty noisy in my classroom.2.) the alarm is great (I have not used the voice setting) but if it gets loud enough in the room the volume of the alarm is not loud enough. I have only had that problem once so far though in the month that I have owned it.All in all I am really happy I have this product. It's pretty pricey and cheaply made but works decently. It's honestly helped me a lot so far. Just make sure you have clear rules about it to your students bc they WILL try to set it off on purpose to be silly and play around.

I hardly write product reviews.I get very loud on calls when I am excited about our products.I use this device to alert me when I get loud and within few days, I have controlled my audio decibel levels.Pwople around me are surprised with the sudden chaneg in my tone and audio levels.Love the product.

I bought this back in January of 2014 to use in my art classroom. My room has poor acoustics as it is and it was hard to have a conversation with someone 2 feet away due to noise level. I bought this product and tried it for a week, and after 5 days the green bulb burned out. I sent it back and imminently got another from the same distributor. I love this product. It takes a few classes for the students to get used to it, some will intentionally try to set it off the first few days but if you stay on top of the students they will get it and now I don't need to remind them to be quiet. They police themselves and it's one less stress I have to deal with. I teach grades 5-9 and use it with all my students. My 8th-9th graders don't tend to set it off but my 5th-7th graders do, it's still helpful to have even with high school students.

This was great when we first installed it in a classroom, it was great, the PreK class loved it and was using it to help keep each other's volume reasonable. As soon as the product was out of the support window, it stopped working. It powers off after five minutes of use. The class is very disappointed.

We bought this for a friend whose elementary school aged children were severely allergic to the word “No” and to tasks such as putting up toys, getting dressed, or going to bed on time – especially if guests were present. The children's “allergic reaction” symptoms included yelling, wailing, and temper tantrums. The Yacker Tracker can be set to go off at levels ranging from complete silence to “television in background” levels. It also counts the number of violations. It also says “Quiet, Please!” in multiple languages if noise levels are exceeded. It worked almost instantly to reduce and eliminate their “allergic reactions.” At first, the children tried to trigger it on purpose. After loosing privileges and rewards if the Yacker Tracker went off, this ended quickly. Highly recommended for this purpose!