Sounds of the Earth - 24 Hours of Earth and Human-Generated Vibrations Prior to the Lockdown, Dublin скачать в хорошем качестве

Sounds of the Earth - 24 Hours of Earth and Human-Generated Vibrations Prior to the Lockdown, Dublin

The stereo spectrogram of the upper range of the secondary microseism (the diffuse noise wavefield at the bottom of each channel’s spectrogram) and of the human-generated vibrations on a busy Monday, from midnight to midnight on 17 February, 2020. These low-frequency signals are inaudible to the human ear. They include the ocean-wave-generated vibrations within the secondary microseism (February 2020 was a particularly stormy month) and the seismic signals from the road traffic and industrial activity. Accelerated by 120x, the audio presents a busy symphonic soundscape: continuous vibrations of machines are transformed into tones of musical quality. The DSB seismic station is situated in the Glenasmole Valley in the Dublin Mountains. The nearby Bohernabreena Waterworks, established in the 1880s, employ giant pumps to supply approximately 35,000 households in South Central Dublin with water. This operation probably creates the most prominent note heard in this recording, seen in the spectrogram by the brightest continuous line starting around 6.30 a.m. and continuing (with three distinct breaks) into the late afternoon. This musical ‘pedal point’ is joined occasionally by other tones and the multitude of shorter sonic events that are scattered throughout the entire duration of the seismogram. This stereo track is a rendering of the 3 components of the motion of the ground at a 236 m elevation, south of Dublin, Ireland. The seismograms were recorded on 17 February 2020, by the seismic station DSB of the Irish National Seismic Network, located at 53.25°N, 6.38°W. Bandpass filtering was applied in the audio domain to reduce the secondary microseism noise and enhance the sonic experience of the human-generated sounds. https://www.soundsoftheearth.ie https://www.dias.ie