Final answer:
The maximum distance for visible notification appliances in a sleeping room is not specified, but there are recommended exposure limits for noise levels in different settings.
Step-by-step explanation:
The maximum distance that visible notification appliances must be located from the pillow in a sleeping room is not specified in the given information. However, the information provided suggests that there are recommended exposure limits for noise levels in different settings. For example, several government agencies and health-related professional associations recommend that 85 dB not be exceeded for 8-hour daily exposures in the absence of hearing protection. The specific regulations and guidelines for notification appliances in sleeping rooms may vary depending on local building codes and safety standards. It is important to consult relevant regulations and guidelines to ensure compliance with the requirements.