Glass wool has better sound-absorbing effect, and its density is smaller, and it has smaller sound reflectivity.
And make it applied to spaces meet the requirements (for example conference rooms require clear voice). Glass wool only absorbs sound over 1500HZ. For example, in order to let the sound field to achieve more pleasant effect, sound-absorbing wool (mineral wool, to remove the noises of people in the waiting room (which is intermediate frequency). Professional sound-absorbing boards can absorb the chosen sound according to which part of sound you need. Curtains are ordinary sound-absorbing matter and absorb only 30%. Performance halls require the sound to reverberate enough but it should not be too long while KTV require the sound appealing.
