What is the name of the computer when activated by the sound makes the camera takes a picture?

I know well rather a piece of equipment connects to an external flash and makes the camera (SLR), take a photo when activated by sound. eg clicking fingers this camera attachment take a picture. Ive forgotten the name of this attachment, as anyone knows and can someone help me!

depending on the camera that it's easier to control remote camera. Sound on trigger do not work so great. Below is some links that may try to follow them

CAB017 – First Build – w. Sound Activated Cold Cathodes – Apologize

NEW JWIN JXR16 VOICE-ACTIVATED MICRO CASSETTE RECORDER WIDE-RANGE SPEAKER EARPHONE/MICROPHONE LED $22.59 Exceptional customer service and unparalleled product expertise....

NEW JWIN JXR36 VOICE-ACTIVATED CASSETTE RECORDER WITH BUILT-IN MICROPHONE 2-WAY VOLUME CONTROL $9.55 Exceptional customer service and unparalleled product expertise....

Spy Camera The World's Smallest Thumb Size 4GB Super Mini Digital Video Audio Camcorder with Patented Sound Activated Recording Function Camera 4GB SD card and Card Reader Included $44.99 The World's Smallest Thumb Size Super Mini Digital Video Audio Camcorder with Patented Sound Activated Recording Function The patented smallest belt-clip digital video camera in the world with high resolution image and voice activated recording. Its unique, ultra small and stylish design with its most advanced cutting-edge video recording technology makes this device the most favorite gadget for J...

Louroe Electronics SA-1A Sound Activated Switch ...

Mini Color Camera / Microphone & DVR - 2 Tall - Sound Activated Handheld Digital Video Recorder - Portable Pocket Security Vandalism & Theft Protection - Great Hidden Covert Surveillance Camcorder - 640 x 480 @ 30 FPS Color Video With Audio - Magnetic & Dash Mounts Included $63.95 Thumb size alloy housing Easy operation w/ LED indicators Manual or Sound activated auto recording Webcam feature, AVI video and JPEG photo format Ultra high resolution 640*480 image w/ 2000K pixels High speed recording 30 frames per second Built-in Li rechargeable battery 2hr continuous recording 2G Micro SD card included - Supports up to 8GB Flexible installation w/ clip or swiveling dash wall m...