Acoustic environment

Sounds that appear to have been recorded within a small room, such as one that can accommodate no more than 15 people.

Sounds that appear to have been recorded in a large room or hall, often with clearly perceptible reverberation.

Sounds that appear to have been recorded in a public space such as store, restaurant, or travel terminus, often characterized by both reverberation and continuous background noise.

Sounds that appear to have been recorded outdoors in a human-constructed environment.

Sounds that appear to have been recorded outdoors in a natural, non-manmade environment.

The sound of an acoustic environment that includes substantial reflection from multiple walls or other hard surfaces. Reverberation is generally perceived as being able to 'hear' the presence and size of the room or space in which the sound is made. The reflected sounds should remain audible for hundreds of milliseconds or longer.

A sound which is a delayed and attenuated repetition of an earlier sound, for example because the sound wave has been reflected back from a distant, planar surface. To be perceived as an echo, the repetion must be delayed by around 100 milliseconds or more.