How to use ultrasound against mice? - briefly
Ultrasonic deterrents emit high‑frequency sound (typically 20–70 kHz) that mice cannot hear but find uncomfortable; install devices near entry points and keep them running continuously. Ensure coverage of all nesting areas and avoid obstacles that block sound propagation.
How to use ultrasound against mice? - in detail
Ultrasonic devices emit sound waves above the audible range for humans, typically between 20 kHz and 70 kHz, to create an environment uncomfortable for rodents. The principle relies on the sensitivity of mouse hearing, which extends up to approximately 90 kHz, allowing targeted frequencies to induce stress without affecting people or pets.
Effective deployment requires selection of equipment that delivers a consistent output of at least 90 dB SPL at the source. Devices with adjustable frequency settings enable rotation through a spectrum to prevent habituation. Placement should cover entry points, travel corridors, and nesting areas; distances greater than 3 m from the emitter reduce intensity below the deterrent threshold.
Key considerations for implementation:
- Frequency range – choose a band between 30 kHz and 55 kHz for maximum discomfort; occasional higher peaks (up to 70 kHz) increase efficacy.
- Power rating – ensure the unit provides ≥ 90 dB SPL at 1 m; higher power extends effective radius.
- Coverage area – calculate based on inverse‑square law; overlapping fields from multiple units prevent blind spots.
- Installation height – position emitters 0.5–1 m above the floor to target the typical foraging height of mice.
- Continuous vs. intermittent operation – continuous emission maintains a constant deterrent field; intermittent cycles (e.g., 10 min on, 5 min off) conserve energy while preserving effectiveness.
- Safety checks – verify that the device complies with local electromagnetic emission standards; avoid placement near infant cribs or sensitive equipment.
Limitations include potential acclimation if a single frequency is used exclusively, reduced effectiveness in open or highly reflective spaces, and the inability to eliminate established infestations without complementary measures such as sealing entry points and sanitation. Legal restrictions may apply in certain jurisdictions; consult regional regulations before installation.
For comprehensive control, combine ultrasonic deterrents with physical barriers, trapping, and habitat modification. Monitoring after deployment—through visual inspection or motion‑activated cameras—confirms reduction in activity and guides adjustments to frequency settings or unit placement.