Looking for a live decibel meter program for Windows?

I live in a dormitory, and there has been some complaints about loud music in the bar. Therefore, we're planning on measuring the sound level, and publish it live on our website, so people can monitor how loud the noise is from the bar.

What I need is a software that can measure the sound level from the microphone, and then (as close to live as possible) output the results to a file. The program is supposed to run 24/7, so it must be able to output the results while it's running. I'll take care of how it's getting published to the website.

I've tried googling, but all software I can find can either not output the results live, or is an iphone or android app.

While such a thing is certainly possible, its results would be meaningless because you can't calibrate the sound pressure level Alternatives include SPL meters with data logging or computer connectivity (see http://www.dx.com/p/usb-portable-2-2-lcd-digital-sound-level-meter-w-512mb-tf-card-beige-4-x-aa-152530 ), or a meter that connects to a smart phone.

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