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. Author manuscript; available in PMC: 2013 Jul 29.
Published in final edited form as: Comp Med. 2005 Feb;55(1):12–23.

Figure 2.

Figure 2

Noise spectrum resulting from the routine activity of attaching a wire-top lid to a typical shoebox-style plastic cage. Sound frequency is on the x-axis, time on the y-axis (response begins at about 1.3 sec), and intensity is color-coded on the z-axis (see legend at right). Measurements were collected as described in Fig. 1. This resulting spectrum produced an intense signal with intense low-frequency content (≤ 5 kHz) of nearly 100 dB SPL and pronounced intensity near 80 dB across the rest of the frequency range.