Broadcasts of recorded distress or alarm calls and propane exploders are types of which deterring devices?

• A. Auditory frightening devices
• B. Visual frightening devices
• C. Habitat modification tools
• D. Chemical repellents

Answer: (A)

Auditory devices. Broadcasts of distress or alarm calls and propane exploders rely on sound to frighten or startle animals, prompting them to avoid the area. They’re not visual tools, they don’t change the habitat, and they aren’t chemical repellents. In vertebrate pest management, using sound is a way to create an aversive cue that discourages pests from returning, though they’re often most effective when used as part of a broader, integrated approach to reduce habituation.