Sound Analyzer

I am looking for a single web page which has an audio analyzer for most common web browsers using the web audio API present in the JS library. The web browser should have waves with their intensity proportional to the sound around the mic. The page should also display the approximate intensity (should be real, but like approx value) and compare it to common noises heard in daily life. A similar example is [login to view URL] For example, the program should spike the waveform when a full volume music video plays near the mic and then list it’s db value while also listing that an average person speaks at 60 dB. Potential common noises that I want to be listed are average conversation, scream, crying, sobbing, laughing, whispering, car honks, emergency siren.