Listening to the Deep: Live monitoring of ocean noise and cetacean acoustic signals

Abstract

a b s t r a c tThe development and broad use of passive acoustic monitoring techniques have the potential to help assessing the large-scale influence of artificial noise on marine organisms and ecosystems. Deep-sea observatories have the potential to play a key role in understanding these recent acoustic changes. LIDO (Listening to the Deep Ocean Environment) is an international project that is allowing the real-time longterm monitoring of marine ambient noise as well as marine mammal sounds at cabled and standalone observatories. Here, we present the overall development of the project and the use of passive acoustic monitoring (PAM) techniques to provide the scientific community with real-time data at large spatial and temporal scales. Special attention is given to the extraction and identification of high frequency cetacean echolocation signals given the relevance of detecting target species, e.g. beaked whales, in mitigation processes, e.g. during military exercises.

Multi-platform underwater passive acoustics instrument for a more cost-efficient assessment of ocean ecosystems

“…In stand-alone platforms, passive acoustic data are generally stored for later recovery and analysis, unless (rarely) there is a direct RF link to shore. Figure 2 Passive acoustic measurements address a broad range of ocean issues [15] Data may also be sent directly through cabling to a host, whether it is a ship or vessel of opportunity (towed array, [10]), or a cabled observatory shore station [11,12]. The limitations are not only at the system level.…”

Developing a new generation of passive acoustics sensors for ocean observing systems

“…2 provides a the large variety of sound acoustic sensor systems or several transducers conditioning, instrument ation and control capability, ower supply. In stand-alone ic data are generally stored alysis, unless (rarely) there ore. Data may also be sent to a host, whether it is a nity (towed array, [14]), or ore station [15][16]. Most ms are still stand-alone with andwidth, and the growing er technologies in global to increase the use of RF via costly and energyMost commercial passive market are also unable to easurement of sound level ery high), e.g.…”

Extraction of pulse repetition intervals from sperm whale click trains for ocean acoustic data mining

“…It has already been used successfully in similar detection tasks Hou egnigan et al, 2010;Andr e et al, 2011). Because the focus of this article is on PRI estimation, only a summary is given here while a detailed description is given in Zaugg et al (2010).…”