According to the data from our questionnaires and interviews, several aspects of the facility were in some way disturbing to the workers. In particular, poor lighting and unwanted noise were frequently cited as bothersome. Therefore, we wished to record some objective measurements of light and sound levels.
Lighting measures were taken Scott Instrument Laboratories Type 451 light
meter. Results were as follows:
| ambient light
|| 49-50 footcandles
|| 30-72 footcandles
| top cages
|| 37 fc
|| 3-45 fc
| bottom cages
|| 4 fc
|| 2-7 fc
|| 16 fc
|| 8-13 fc
The discrepancies between the top and bottom cages caused much concern.
This was also cited as a problem by many of the workers.
The light levels for the bottom cages were far below the recommended
level of illumination level for activities similar to cleaning.
Because speed is necessary for the efficiency of the workers,
increased lighting levels are recommended. However, the concern of glare
should be considered when increasing light levels.
Noise levels were determined using a Sylvania/GTE Model VS-2000 Sound Meter.
Results were as follows:
| Avg for Entire Facility
|| 58 decibels
|| 48-64 decibels
| Marmota Facility
|| 62 dB
|| 55-70 dB
| Conventional Facility
|| 54 dB
|| 48-62 dB
| Isolation Rooms
|| 61 dB
|| 60-62 dB
| Rabbit Colony
|| 58 dB
|| 58 dB
Although noise was mentioned by employees as an annoyance, it was not determined to be
at dangerous levels in the facility.
Highest noise levels were measured near air conditioning units. Published research studies are inconclusive as to the
effects of noise on performance, so it is difficult to say if reducing
the noise levels in this facility would increase performance. However,
because employees did mention it as a problem, if possible, considerations
to reduce the levles should be made.