Soundscapes from an urban environment bordering on a green space

Authors

  • Dale Ellis Mount Allison University; Dalhousie University; Dale Ellis Scientific Inc

Abstract

Acoustic recordings were made over several years in an urban setting bordering on a green space. Recording was 5 minutes every half hour, day and night, except for rainy weather and occasional one-month absences. The recorder was a Wildlife Acoustics SM3, vintage 2015, usually deployed using two microphones, one near ground level and another 10 m away, about 2 m off the ground. The sampling frequency was 24 kHz, and the raw data archived as WAV files. Only a cursory look at the data has been done to date. For each 5-minute recording, spectra were taken every 1024 points (0.043 s), with 50% overlap, and the mean and median levels obtained at 512 frequencies. The dominant feature is of course the daily variation due to bird vocalizations, but seasonal and annual variations can be investigated. Recently, a similar bioacoustics recorder was obtained from Frontier Labs. Comparisons made among 6 microphones spaced within 30 cm of each other, and an attempt made to obtain approximate calibration levels in dB re 20 microPascals. The talk will presentsome highlights from the measurements and analysis.

Author Biography

Dale Ellis, Mount Allison University; Dalhousie University; Dale Ellis Scientific Inc

Retired from Defence Research & Development Canada – Atlantic Research Centre. Adjunct Prof. in Physics Department at Mount Allison University, and in Oceanography Department at Dalhousie University.

Additional Files

Published

2022-07-05

How to Cite

1.
Ellis D. Soundscapes from an urban environment bordering on a green space. Canadian Acoustics [Internet]. 2022 Jul. 5 [cited 2024 Jun. 22];50(3):50-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3849

Issue

Section

Proceedings of the Acoustics Week in Canada