A reflection of sound that comes from an indirect source or route.

अप्रत्यक्ष प्रतिध्वनि

English Usage: The indirect echo of her voice in the mountains was hauntingly beautiful.

Hindi Usage: पहाड़ों में उसकी आवाज़ की अप्रत्यक्ष प्रतिध्वनि मंत्रमुग्ध कर देने वाली थी।