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Open Access Noise Produced by Vacuuming Exceeds the Hearing Thresholds of C57Bl/6 and CD1 Mice

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Daily vacuuming of floors and flat-shelf racks is a standard procedure in our rodent housing rooms. To determine whether the noise produced by this activity is a potential stressor to animals used for transgenic and knockout mouse production, we measured the sound levels in our genetically engineered mouse facility under ambient conditions and at the in-cage and room levels during vacuuming. Spectral analysis showed that vacuuming produces a multitonal, low-frequency noise that is not attenuated by microisolation caging with bedding material. Comparison of cage-level spectral analysis results with age-specific audiograms of C57Bl/6 and CD1 mice showed that vacuuming produces frequencies audible to C57Bl/6 mice at 3 and 6 mo of age and to CD1 mice at 1 mo of age. These findings suggest that vacuuming in animal rooms could be a source of stress to animals with these genetic backgrounds.

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Document Type: Miscellaneous

Publication date: January 1, 2007

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  • The Journal of the American Association for Laboratory Animal Science (JAALAS) serves as an official communication vehicle for the American Association for Laboratory Animal Science (AALAS). The journal includes a section of refereed articles and a section of AALAS association news. The mission of the refereed section of the journal is to disseminate high-quality, peer-reviewed information on animal biology, technology, facility operations, management, and compliance as relevant to the AALAS membership. JAALAS accepts research reports (data-based) or scholarly reports (literature-based), with the caveat that all articles, including solicited manuscripts, must include appropriate references and must undergo peer review.

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