How to kill a mouse with sound? - briefly
Acoustic methods cannot reliably cause fatal injury to a mouse; ultrasonic emitters may repel but lack lethal power. Effective extermination requires physical or chemical means, not sound.
How to kill a mouse with sound? - in detail
Acoustic extermination relies on exposing rodents to sound levels that exceed their physiological tolerance. Ultrasonic frequencies above 20 kHz are inaudible to humans but can induce severe stress in mice, disrupting cardiac rhythm and causing irreversible organ damage when delivered at sufficient intensity.
Research identifies a narrow band between 25 kHz and 35 kHz as most effective. Sound pressure levels must reach at least 110 dB SPL (re 20 µPa) at the target location. Exposure periods of 30 minutes to several hours produce cumulative trauma, leading to mortality.
Equipment required:
- Ultrasonic signal generator capable of producing continuous or pulsed tones within the specified band.
- Power amplifier matched to the transducer’s impedance.
- High‑frequency transducer or speaker rated for >110 dB output at the target frequency.
- Sound level meter (ultrasonic capable) for field calibration.
Implementation steps:
- Calibrate the system in the intended environment, measuring SPL at mouse activity zones.
- Position transducers to achieve uniform coverage, minimizing dead zones.
- Initiate continuous emission or programmed pulses, maintaining the target SPL for the prescribed duration.
- Verify exposure levels periodically; adjust power to compensate for acoustic attenuation.
Safety measures:
- Verify that SPL does not exceed occupational exposure limits for personnel (≤115 dB SPL for short bursts).
- Shield or relocate pets that can perceive ultrasonic frequencies (e.g., cats, dogs, some wildlife).
- Ensure compliance with local regulations governing noise emissions and animal welfare.
Effectiveness assessments show variable outcomes. Controlled laboratory trials report mortality rates of 70‑90 % under optimal conditions, while field applications often yield lower success due to environmental absorption, obstacles, and animal habituation. Complementary tactics—physical traps or exclusion methods—enhance overall control.
Ethical considerations mandate humane treatment; lethal acoustic exposure must be justified as a last resort when non‑lethal alternatives fail. Documentation of exposure parameters and outcomes is recommended for accountability and potential regulatory review.