Acoustic ecology

Acoustic ecology emerged in the late 1960s through the work of Canadian composer and environmentalist R. Murray Schafer, who coined the term 'soundscape' to describe the acoustic environment as perceived by humans. Schafer's World Soundscape Project at Simon Fraser University aimed to document and analyze soundscapes, leading to the foundational text The Tuning of the World (1977). The field integrates acoustics, ecology, and social science, focusing on the relationships between living organisms and their sonic surroundings.

Central to acoustic ecology is the classification of sounds into biophony (biological sounds), geophony (natural non-biological sounds like wind and rain), and anthrophony (human-generated sounds).¹ Researchers use passive acoustic monitoring (PAM) to record soundscapes over time, analyzing acoustic indices to assess biodiversity and habitat health.² These methods allow for non-invasive tracking of species presence, behavior, and ecosystem dynamics.

Acoustic ecology has practical applications in conservation biology, such as detecting rare or elusive species, monitoring invasive species, and assessing the impact of noise pollution on wildlife.³ For example, researchers use acoustic monitoring to track bird migrations and whale populations, providing data for management decisions. Soundscape analysis also helps evaluate the effectiveness of protected areas and restoration efforts.

The field also addresses the human experience of sound, including the effects of noise pollution on health and well-being. Studies have linked chronic noise exposure to cardiovascular disease, sleep disturbance, and cognitive impairment in children. Acoustic ecology advocates for soundscape design in urban planning to create healthier environments, and it informs policies on noise regulation.

Beyond mainstream applications, acoustic ecology has niche areas: it explores the acoustic behavior of insects, amphibians, and fish, which are often overlooked. It also examines the role of sound in plant life, such as the vibration of flowers attracting pollinators. Historical soundscapes, reconstructed from literature and recordings, offer insights into past environments. Additionally, the field intersects with music and art, as composers like Schafer have created works inspired by natural soundscapes.

Soundscape

The acoustic environment as perceived by humans, including all sounds in a given area.

Biophony

Sounds produced by living organisms, such as animal vocalizations.

Geophony

Natural non-biological sounds, such as wind, rain, and flowing water.

Anthrophony

Sounds generated by human activities, including noise pollution.

Passive acoustic monitoring (PAM)

A method of recording soundscapes using autonomous recorders to study wildlife and environments.