Every space is unique and everything in the room affects the acoustics to some extend. A hard floor surface, a large bookcase filled with books, a leather sofa, all of those affect speech clarity and comfort for our ears. Generally, the more hard materials are used in a particular room, the worse the acoustics will be.
We have been improving acoustics in offices, boardrooms, conference areas. living rooms ect for many year now. Our experience has taught us the following:
The amount (M) of sound absorbing material needed to improve the acoustics
1/3 of your total surface furnished with acoustic products on the wall or ceiling is already sufficient to .
A room of 15 x 7 meters equals 105 m2 and a third of this equals 35 m2. You can then choose Acoustic Art (in total 35 m2) or Acoustic Vases of which you might need 6 pieces. This we calculate according to the acoustic filling we use.
We even use an iPhone application that works quite good if you want to know how many decibel is in your room. Locating the frequency of noise is measured in a quick and simple way.
Applying egg boxes underneath the table; it only makes sense for shoes making noise on the floor and nice for kids picking material from under the table during their meal.
Hang curtains; curtains indeed absorb sound, but are mostly tight together and therefor have a low acoustic value.