Which room improvement does NOT adversely affect an audio discriminator?

When considering the impact of room improvements on an audio discriminator, it's important to focus on how these changes can influence sound transmission and detection. An audio discriminator is designed to differentiate between normal background sounds and alarm signals.

New carpet has a propensity to absorb sound, which could diminish the effectiveness of the audio discriminator by dampening the alarm sounds it is meant to detect. Similarly, new furniture could obstruct sound waves or affect the acoustics of the room, potentially leading to a reduction in detection efficacy. New lighting, while primarily visual, could influence ambient noises from operation, such as buzzing or humming from fixtures, which might become part of the background noise that the discriminator has to sort through.

In contrast, new paint generally does not impact acoustic properties significantly. Most paint types have minimal effect on how sound travels in a room, leaving the overall acoustic environment largely unchanged. As a result, introducing new paint would not adversely affect the function of an audio discriminator, allowing it to operate reliably in detecting alarm signals amidst background noise.