Limitations
Study limitations include the possibility that staff modified
their behavior during recording, that measurements occurred
on one day, and that the sound meter used in this
study was different from that used in the first study, although
they were comparable, valid, and reliable sound
meters. Single measures of specific sounds at each time
point also were done, and it was not possible to compare
the data using inferential statistics. In retrospect, additional
information describing the patient population and environment
would have assisted in evaluating findings from the
original and replication studies.