Amazon.com: Enhanced Version Super Sensitive Listen Thru-Wall Contact/Probe Microphone Amplifier System : Electronics
AuviTran AV-WALL-DT4i-LE Dante Super Compact Mic/Line Interface for Wall-mount Version - without Rotary Encoder
Wall probe
Stethoscope wall contact microphone FL-330 with needle-less microphone sensitive to human voice
WP1-2NC3FD: Wall Plate with Mic Connectors | Lowell Manufacturing
Amazon.com: AceTaken Microphone Wall Mount, Ceiling Holder Stand Compatible with Blue Yeti X Nano Snowball and Shure HyperX Razer Microphones : Musical Instruments
Amazon.com: Microphone Wall Mount Boom Arm - Microphone Wall Mount for Mic holder,Horizontal Mounting Wall,Space Saving Desktop Metal Mic Stand Clamp by SUNMON : Musical Instruments
Poly | Room Audio | IP Ceiling Microphone Array | White | 2215-85360-001
Telex WP-300S Wall Plate Microphone with Switch F.01U.391.595