はんきょう反響hankyou
1.

The phenomenon of sound waves reflecting off surfaces and returning to be heard again, often perceived as a repeated auditory effect.

2.

The response or reaction from society or the public to a specific event or announcement, often in terms of discussion or popular sentiment.

Example:

その部屋に彼の声が反響した。

はんきょうていい反響定位hankyouteii
1.

A method used by certain animals to locate objects and navigate their environment by emitting sound waves and interpreting the echoes that return to them.

2.

A biological adaptation involving the perception of sound reflections, allowing organisms to identify the presence, distance, and size of objects in their surroundings.

3.

A sensory technique that involves producing auditory signals and analyzing the subsequent reverberations to acquire spatial awareness and directional information.