Is very likely that you have been to a snack bar or restaurant where the noise generated by the diners talking prevented you from having a normal conversation, even having trouble understanding your interlocutor and sometimes forcing you to raise your voice to make yourself heard.
These problems are quite common and are not only limited to venues of restaurant industry, but can also appear in all types of venues with reflective surfaces -mirrors, glass, polished floors and walls, etc.- or with open spaces inside -minimalist architecture-
These rooms have problems due to excessive reverberation.