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2. Silencer (firearms) - Wikipedia

   en.wikipedia.org/wiki/Silencer_(firearms)

   Different silencer designs. Gun rights advocates, gun media and the firearms industry generally claim that the word "silencer" is defined as meaning total silence, while "suppressor" or "moderator" are defined as meaning only reduced sound intensity, in spite of its original definition.

3. Sound attenuator - Wikipedia

   en.wikipedia.org/wiki/Sound_attenuator

   The dynamic insertion loss of a sound attenuator is the amount of attenuation, in decibels, provided by the silencer under flow conditions. While flow conditions in typical low velocity duct systems rarely exceed 2000–3000 ft/min, sound attenuators for steam vents must withstand airflow velocities in the 15,000-20,000 ft/min. range. [10]

4. Muffler - Wikipedia

   en.wikipedia.org/wiki/Muffler

   Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...

5. Double-barreled shotgun - Wikipedia

   en.wikipedia.org/wiki/Double-barreled_shotgun

   One of the advantages of double-barreled shotgun with double triggers or single selective trigger, is that the second shot can be taken almost immediately after the first with merely a second trigger pull, without needing to manually operate the action (which will inevitably destabilize the gun from the shoulder position and affect aim), and ...

6. Double action - Wikipedia

   en.wikipedia.org/wiki/Double_action

   However, if a user shooting under stress short-strokes the trigger by only releasing it halfway, the trigger will reset, but with a 38 N (8.5 lb f) pull. This temporary increased trigger pull is intended to prevent negligent discharges. Double-action – firearms trigger: Pressing the trigger 1) cocks, and 2) drops the hammer. The hammer can ...

7. Transmission loss (duct acoustics) - Wikipedia

   en.wikipedia.org/wiki/Transmission_Loss_(duct...

   Transmission loss (TL) in duct acoustics describes the acoustic performances of a muffler-like system.It is frequently used in the industry areas such as muffler manufacturers and NVH (noise, vibration and harshness) department of automobile manufacturers, and in academic studies.