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2. 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]

3. Binary trigger - Wikipedia

   en.wikipedia.org/wiki/Binary_trigger

   A binary trigger (or pull and release trigger) is a type of device that allows a semi-automatic firearm to fire at an increased rate. A binary trigger works by firing one shot upon pulling the trigger and then firing a subsequent shot upon release of the trigger. Binary triggers are installed through modification of the fire-control group.

4. Hell-fire trigger - Wikipedia

   en.wikipedia.org/wiki/Hell-fire_trigger

   A hell-fire trigger is a device that allows a semi-automatic firearm to fire at an increased rate. The hell-fire clamps to the trigger guard behind the trigger and presses a "finger" against the back of the trigger to increase the force that returns the trigger to its forward position, effectively decreasing the time required for the trigger to reset, allowing for a faster follow-up shot.

5. 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 ...

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. Schmitt trigger - Wikipedia

   en.wikipedia.org/wiki/Schmitt_trigger

   With the trigger now in the high state, if the input voltage drops enough (below the low threshold), Q1 begins cutting off. Its collector current reduces; as a result, the shared emitter voltage drops slightly and Q1's collector voltage rises significantly. The R 1-R 2 voltage divider conveys this change to the Q2 base voltage and it begins ...