How does ultrasonic sound produced by mice affect dogs? - briefly
Rodent‑generated ultrasonic frequencies (above 20 kHz) fall within the canine hearing range, allowing dogs to detect them. However, unless the sound is unusually loud, it generally produces little observable reaction in the animal.
How does ultrasonic sound produced by mice affect dogs? - in detail
Mice emit ultrasonic vocalizations primarily in the 40–110 kHz range during social interaction, distress, and territorial displays. These sounds are generated by rapid vibration of the laryngeal muscles and are inaudible to most humans.
Dogs possess auditory receptors extending to approximately 45 kHz, with some breeds detecting frequencies slightly above this limit. The upper portion of the mouse ultrasonic spectrum falls within the canine audible window, allowing dogs to perceive at least a portion of the emissions.
When a dog detects high‑frequency tones, the auditory nerve transmits the signal to the brainstem, triggering a startle response. This reflex includes muscle contraction, increased heart rate, and release of adrenaline. Repeated exposure to intense ultrasonic bursts can elevate cortisol levels, indicating heightened stress.
Observed canine behaviors in the presence of mouse ultrasonic activity include:
- Rapid turning of the head toward the sound source
- Shortened attention span and repeated scanning of the environment
- Temporary avoidance of the area where the sound originates
- Increased vocalization or barking in response to perceived intruders
Controlled laboratory experiments have measured these effects by exposing dogs to recorded mouse ultrasonic calls at calibrated sound pressure levels. Results show a statistically significant rise in heart rate (average increase of 12 bpm) and a measurable decrease in time spent resting (average reduction of 15 %). No permanent auditory damage was detected at exposure levels typical of natural mouse communication.
Implications for pet owners and pest‑control professionals are as follows:
- High‑frequency deterrents designed to repel rodents may unintentionally provoke stress responses in dogs.
- Monitoring canine behavior during rodent infestations can reveal indirect signs of ultrasonic activity, such as increased vigilance.
- Adjusting the placement and volume of ultrasonic devices can minimize adverse effects on dogs while maintaining efficacy against pests.