What Are Animals?

Animals, as a subject of engineering and applied science research, are biological organisms studied through instrumentation, imaging, sensing, and computational modeling to advance fields ranging from veterinary medicine to ecological monitoring and biomimetic design. Within the IEEE community, research on animals focuses not on taxonomy or natural history but on the development and application of technologies that measure, interact with, or draw inspiration from living animal systems. The field intersects electrical engineering, biomedical engineering, signal processing, and environmental sensing.

Animals serve both as subjects of study and as models for engineering innovation. Their sensory systems, locomotion mechanisms, and collective behaviors have informed the design of autonomous vehicles, adaptive signal processors, and distributed sensor networks.

Biological Systems and Life Sciences

The engineering study of animals treats them as complex biological systems with measurable physical and chemical states. Sensors are used to record electrical activity in muscle and neural tissue, pressure changes in the cardiovascular system, metabolic gas exchange, and acoustic signals produced during communication or echolocation. Bioacoustic monitoring, in which automated systems classify animal vocalizations from large audio datasets, has become an important remote-sensing method in conservation. Research published in Nature Communications Biology on scalable microphone arrays for bioacoustic tracking demonstrates how heterogeneous sensor networks can localize individual animals across broad habitats using their sound signatures. Signal processing algorithms drawn from communications engineering are central to this work, since classifying species from noisy field recordings presents the same detection and classification problems found in radar and sonar.

Small Animal Imaging Systems

Medical and preclinical research depends heavily on imaging technologies adapted to small animal subjects. Micro-computed tomography, small-animal MRI, and positron emission tomography scanners operate at spatial resolutions and bore sizes calibrated for rodents, which serve as primary model organisms in biomedical research. These systems require specialized radio-frequency coils, detector arrays, and reconstruction algorithms distinct from those used in clinical human imaging. Functional imaging of freely moving animals has driven development of miniaturized wireless neural recording systems and implantable fluorescence sensors. The NIH National Center for Research Resources has supported development of imaging and monitoring standards for animal welfare in preclinical environments, reflecting the intersection of engineering performance and ethical constraint in this subdiscipline.

Animal Deterrents

Engineering systems designed to deter animals from specific areas constitute a practical subdiscipline with applications in agriculture, aviation safety, and infrastructure protection. Acoustic deterrents emit species-specific distress calls or predator vocalizations to repel birds or mammals from airfields, orchards, and fish farms. Ultrasonic emitters are used to discourage rodents and small mammals from entering buildings or crop storage areas. Electric fencing systems with pulse-coded controllers protect livestock enclosures and nature reserves. The design of effective deterrents requires knowledge of animal sensory thresholds and habituation rates, making the field inherently cross-disciplinary between behavioral biology and electronic systems engineering. A review of automated bioacoustics methods in ecology and conservation in the Journal of the Royal Society Interface outlines how sensor systems and classification algorithms are evaluated against ground-truth behavioral observations, a central challenge in both deterrence and monitoring system design.

Applications

Animals, as a research subject and interaction domain, have applications across a wide range of engineering fields, including:

• Agricultural monitoring for livestock health and herd management
• Wildlife conservation through population tracking and habitat assessment
• Biomedical research using animal models for drug and device testing
• Aviation and transportation safety via bird-strike prevention systems
• Biomimetic robotics inspired by animal locomotion and sensory mechanisms
• Pest control and infrastructure protection using acoustic and electronic deterrents