I need a sonometer

Well that's it, I need to measure street noise, rehearsal room noise, etc, in order to test soundproofing and isolation techniques. For example the level of the noise leaked into my neighbour's bedroom before and after the soundproofing. Can you point me to some sellers in the USA Some links will be appreciated too. Thanks. Ed.

Hi: I found a nice Sound Level Meter in Fry`s Electronics in Woodland Hills in Los Angeles, CA. Its from "Extech Instruments" (Chinese) under the 100´s. Hope you can make it or go into their web page. JCristian

Hi: I found a nice Sound Level Meter in Fry`s Electronics in Woodland Hills in Los Angeles, CA. Its from "Extech Instruments" (Chinese) under the 100´s. Hope you can make it or go into their web page. JCristian