This sound effect closely resembles the way a Delay-Effect is created, and in fact could be described as being many Delay-Effects combined together and spread across many varying lengths of time in milliseconds, making a cloudier, more spacious type of sound.
This effect can be heard naturally anywhere around you. Small spaces, such as offices, rooms, or inside a car even - has a much shorter reverb tail when compared to larger spaces, such as: a Gymnasium, Concert Hall, Cathedral, Arena, Tunnel - which can last for several seconds.
Analog, Digital devices and software plugins can closely mimic this natural sound phenomenon. Some of them typically include:
- Several types of room modes;
- Control over the length of the reverb tail;
- A Dry / Wet knob to adjust the amount;
Occasionally they will include built in EQ, damping, gating and more parameter-controls over the specific reverb type selected on the device / plugin.