Microphone cases may be as important as microphone itself. This idea can be used on other sensors.
Large "C" shape is metal shell cap from one end of 3 AG fuse. Heat with soldering iron if cleaning out inside is hard. Lamp represents photocell with insulated electrical connections through bottom of cap. Around photocell use silicone rubber or epoxy cement to mount photocell and small brass tube for directional light in place. Diode represents small object to count or detect. Ground symbols show light source direction able to reach photocell.
Custom setups to fill the bill.
