an enclosed space for producing reverberation of a sound
Reverberation The first reverb effects created for recordings used a real physical space as a natural echo chamber. A loudspeaker would play the sound, and then a microphone would pick it up again, including the effects of reverb. Although this is still a common technique, it requires a dedicated soundproofed room, and varying the reverb time is difficult.
A Quiet Place (film) Regan, who was not allowed in the house basement previously, sees her father's notes on the creatures and on his experimentation with several different implants. When the creature returns to invade the basement, Regan places the boosted implant on a nearby microphone, magnifying the feedback to ward off the creature. Painfully disoriented, the creature exposes the flesh beneath its armored head, and Evelyn shoots the creature in the head with a shotgun, destroying its head and killing it. The family views a CCTV monitor, showing two creatures attracted by the noise of the shotgun blast approaching the house. With their newly acquired knowledge of the creatures' weakness, the members of the family arm themselves and prepare to fight back.