Sound suppressors by definition are designed, in this application, to suppress the sound of a firearm. Some do, and some don't. Sound suppressors were most often evaluated and compared by a logarithmic ratio called the decibel (dB) [see below]. Yet, somewhat mysteriously, in recent times the largest and most prominent manufacturers of sound suppressors have stopped any reference whatsoever to the specific sound pressure level reduction of their product line in their catalogs. The intriguing question is, of course, why? When asked, they will say it's too easy for less-than-reputable manufacturers to cite phony data. Say again? Since when have the lies of others prevented anyone from presenting valid data obtained by means of industry and government accepted procedures? We are justifiably proud of the sound pressure level reduction that is produced by our sound suppressors. The data presented here has been obtained by reliable outside independent sources and by our own testing, which is conducted in rigid conformity with US military testing procedures. Furthermore, our customers want to make comparisons with the sound suppressors of other manufacturers and expect to see quantitative data in this regard.

Measuring Sound Pressure Level Reduction - How it's done.

We use the industry standard Bruel & Kjaer Model 2209 sound meter. It was re-calibrated by Bruel & Kjaer in April of 2006 to ensure that it was functioning properly. We use the US Military standard testing procedure for sound suppressors, which stipulates that the meter should be placed one meter away from and 90-degrees to the side of the firearm's muzzle and held parallel above the ground at a height of 1.6 meters over a non-reflecting surface. The muzzle is positioned perpendicular to the microphone before each shot.

Ten non-suppressed readings are taken first and then averaged to provide a baseline figure. Then, ten sound-suppressed readings with 3 to 5 minute cooling intervals between each shot are taken. This data is also averaged and the result subtracted from the baseline figure. This figure represents the degree of sound suppression.

The ambient temperature, humidity, barometric pressure, elevation above sea level and date are also recorded during the testing process. It's 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.

Using the procedures described above, the actual sound pressure level reductions and specifications of the four most popular Elite Iron sound suppressor models are presented on this web site.

Delta Model D22 (.22 caliber - 5.56x45mm NATO)
Bravo Model D30 (.30 caliber - 7.62x51mm NATO or .30-06)
Sierra Model 338 (.338 Lapua)
Echo Model PS22 (.22 Rimfire)