A combined term referring to the distortion or feedback effect in sound which creates an echo-like noise.

प्रतिध्वनि विकृति शोर

English Usage: The concert's sound quality was compromised due to echo distortion noise.

Hindi Usage: संगीत कार्यक्रम की ध्वनि गुणवत्ता प्रतिध्वनि विकृति शोर के कारण प्रभावित हुई थी।