Création sonore – Sound creation
Sound creation based on Irène Mopin research data,🥈second price of the UK contest Research Soundings 2022
Description
For seabed habitat mapping or other marine applications, the nature of the seafloor is convenient to be known. Its measurement can be achieve using echosounders. The constitution of the echo backscattered by the bottom is studied in order to define the type of seabed (sand, rocks, mud…). The analysis uses signal processing coupled with statistical methods, the objective being to define with accuracy the acoustic response of the seabed. The sound piece submitted is composed of ultrasonic seafloor echoes generated with echosounder at 200kHz and 38kHz simultaneously and recorded with a hydrophone. They are transposed in the audible frequency range to be heard, and pitched for the artistic creation. Sounds recorded straight in the audio band with another hydrophone are also added to the piece. We can hear the sound of rocks clashing, gravels, and movements of the sea water. For a better immersion in the seafloor sound, listeners are advised to use a headset.
Details about the sound creation (at 23.47)
Conférence
Irène Mopin, “Research Sounding Competition, The sound of the seafloor », Webinar of the United Kingdom Acoustics Network, March 2022
Irène Mopin 