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The Larson Davis SoundTrack LxT® Sound Level Meter Kit KLxT-QPR was specifically designed for gunfire testing, including suppressor and silencer testing. In product testing, the examiner is often tasked with determining whether the installation of a suppressor results in a “perceptible reduction” in the sound pressure level of a gunshot. The KLxT-QPR is an ideal tool for gathering, analyzing, and presenting detailed firearm noise data quickly, easily, and concisely. With a sleek ergonomic design, it is able to be held and operated with just one hand. See the following video for a demonstration of a firearms acoustic test.
Microphone placement, calibration, measurement setup on a Larson Davis LxT, and what to look for in your data downloaded through the software G4 LD Utility
With the included ¼” prepolarized pressure microphone, Model KLxT-QPR, is capable of reading the very high levels typically associated with gunfire testing. These readings can quickly be organized and stored on internal memory and exported to a PC for archiving and reporting. Reports generated include selectable noise parameters (peak, background level, max SPL, etc.) as well as calibration history of the instrument, important for courtroom presentations.
All sound level meter rentals include NIST-traceable calibration certificates. Rentals ship with a customer specific expected return date in mind. For example, if equipment is expected to be out for 5 months, the last calibration date will be within the past 7 months.
Download a meter setup file for firearms testing. Download includes setup files for meters with and without ENV firmware. Please use the file appropriate for your meter. To download and extract the files:
To set up the meter's physical location, below are some suggestions. In general, US Military standard testing procedure for sound suppressors consists of:
Other factors to note during recording may include:
It is important to note that there will always be minor day-to-day variations in the data obtained as a consequence of changes in the weather parameters.