It was difficult to understand the words because of the sound-absorbing walls.

An example of the third way would be to erect sound-absorbing walls in other parts of the house to block sound coming from the laundry.

The interior of the hall is functional yet elegant, with the carpeted floors and acoustic walls in deep red and the chairs and sound-absorbing walls in muted grey.

With a big gleaming, symphony orchestra directly behind her, not to mention a sound-absorbing wall of New Year's Eve decorative draping, her resources of size and resonance had a harder time commanding a space the size of Avery Fisher Hall.