The sound samples on this page were created to show the differences in acoustics between the various rooms in the Baths of Neptune in Ostia. Each sample is set to sound as if it were played in a different room in the bath complex. The first sample is ‘clean’ so, unaltered from the original recording. A map of the bath complex highlights the differences in calculated reverberation times, although the variations in calcultations only provide minimal auditory difference. What you hear in the samples are the combination of dimensions, decorations (marble or plaster) and amount of water surface area. It is the variations in these elements, which create different acoustic properties in the space. See if you can hear the differences between the samples before trying to figure out where in the bath complex the samples are taken from.
For some thoughts on the choice of music, see my post here.
Sample 1: Clean