The MIOPS Smart Trigger can be set up to trigger a Flash Gun when a sound is detected. I set up a test for the MIOPS Smart Trigger this evening with a single Cactus RF60x Flashgun and some party poppers (The small plastic capsules that fire streamers)
Flash and MIOPS Setup
I connected the Flash gun directly to the MIOPS Smart via the connection cable and angled the flash head up and towards the X-T2. The X-T2 was set to take a 5 second exposure and the room had to be dark to ensure no ambient exposure.
I triggered the camera and fired the popper from a position around 6 inches above the flash gun.
The MIOPS Smart allows adjustments to how loud the sound needs to be to initiate a trigger and any delay between detecting the sound and triggering.
I experimented with delays of between no delay and 30ms for the shots shown below.
With no delay set the MIOPS has captured the streamers almost before they have begun to unravel.
Please excuse the soft focusing through the range of images. This was a quick timing test and I was not paying too much attention on the depth of field.