[Sonnie]

We may need to check this one out and see how accurate it is...

Link to Product: ATI SLM100

ATI’s new Precise Sound Pressure Level Meter is an extremely versatile device for measuring sound intensity in just about any acoustic environment – loud or soft; high-pitched, low-pitched, or broadband; intermittent or continuous. You can use it to measure noise levels in factories, schools, offices, and airports, or to check acoustics of studios, auditoriums, and home theater installations. The SLM-100 features a large, easy-to-read analog meter for taking quick measurements anywhere. A 9-volt battery supplies power, so the meter is completely portable. The RANGE selector lets you select one of seven sound level ranges, each spanning 16 dB. The needle indicator shows the actual sound level as a displacement from the center point. The RCA OUTPUT jack lets you connect the meter to recording or other measurement equipment. The REPONSE selector has two settings: FAST and SLOW. In the FAST position, the meter reacts quickly to changes in the sound level, showing you the peak sound levels present in the environment. The SLM-100 is a precise, versatile instrument – perfect for your next set-up.

• Seven SPL Range Make measurements from 50-126 dB (referenced to 0.0002μbar)
• A and C Weightings Check compliance with safety regulations and perform acoustic analysis
• Slow and Fast Response Measure peak and average noise levels
• Built-in Battery Indicator Monitor battery condition easily right on meter
• RCA Connector output Connection to camera, home theater or test equipment
• Threaded Insert Attach the meter to a camera tripod for increased accuracy