USA - 1960s - Targets of varying thickness are put into a tank and dolphins are blindfolded to begin a sonar discrimination test.
Traffic Light Showing Green Signal
No Signal TV Display CRT Distortion
Check and Cross Sign Animation on transparent background. Video footage of yes or no. Green check mark and red cross icon ideal for concept approval or rejection
Green Bicycle Signal Indicating Right of Way for Cyclists at Public Traffic Intersection
Mandatory Direction Traffic Sign
No signal inscription on television screen
Small Traffic Light
Black city with a traffic light. Concept. Traffic light for pedestrians with timing standing in the evening darkness
Person in a state of confusion and distress
Blue Traffic Sign Indicating All Directions
Traffic Light in big city. LED lights close up
Mental and physical distress
A large thermometer rising to the BOILING POINT
Low GPS signal warning shown with animated icon
No signal inscription on colorful bars background
Small Traffic Light Showing Red
NEW
Japanese traffic light signal flashing green arrow
words bad signal, with each letter made from 100s of videos of changing vintage televisions in vertical