acoustic delay line

An acoustic delay line is a device that uses sound waves traveling through a medium, like a crystal or glass, to delay the transmission of a signal. When an electrical signal is converted into an ultrasonic sound wave, it travels through the medium and emerges after a specific, predictable amount of time. This delay allows signals to be synchronized or processed in systems such as radar, communication, or signal filtering. Essentially, it’s a controlled way of "holding" a signal temporarily, using the speed of sound in a material to create precise timing delays.