The purpose of architectural acoustics is:
To reduce the reverberation time (commonly known as "echo").
This result is reached by absorbing reflected sound.
The reverberation time is:
The time between emission of a sound and the complete interruption of its source.
Ideal reverberation times vary according to the volume and usage of the area concerned.
Effects of a too long reverberation time on the acoustics of a room:
When speaking, a long reverberation time causes an overlap between successive syllables,
with a masking effect that reduces clarity. In the case of music,
persistence of low frequencies causes the sounds to melt together,
with a confused or indistinct effect.
Effects of a too short reverberation time on the acoustics of a room:
If the reverberation time is too short, the impression is that of a "dry" sound,
unsupported by the environment. Further, a short reverberation time in a large area
can cause the sound volume to be too low at the far end of the room, as the sound
reflections that otherwise would sustain volume are not present.
Why use noise absorbing coverings
Sound absorbing materials