Ensuring there's a space with no loudspeaker close-by possibliy identifying it as quieter corner. Reduce noises, e.g., provide cups with cork mats underneath. Install rubber feet or felt under the feet of chairs.
Provide a separate quiet room. (This should not be a broom cupboard and ideally have natural light.) If possibly ensure that not all surfaces are hard and consider installing sound absorption material where it makes sense.
