ACOUSTIC DATA
There are two main kind of acoustic data:
Audio Recordings: Micros and hydrophones allows the researchers to capture audio recordings of environmental sounds using. They encompass a wide spectrum of sounds according to the range of vocalizations, including marine mammal vocalizations, anthropogenic noise (such as shipping and industrial activities), natural ambient sound patterns, and geological or hydrological events (such as earthquakes or underwater volcanic eruptions). These recordings are stored in digital formats in a database and can cover extended periods, allowing for continuous overseen and analysis. For example, the pressure exerted by passing ships was calculated at specific sampling locations, aiding in understanding the impact on marine life.
Spectrograms: They represent graphics of sound frequencies and intensities over time. Generated from audio recordings, spectrograms provide a detailed visual depiction of acoustic signals, enabling researchers to analyze specific features such as frequency content, temporal patterns, and amplitude variations.
VISUAL DATA
There are three main kind of visual data:
Image Recordings: Cameras allow to take still images providing data in two dimensions (2D) whihc are the coordinates of each pixel (x,y).
Video Recordings: Cameras allow to take videos providing data in three dimensions (2D+t) which are the coordinates of each pixel (x,y) and the time t of the acquisiton. The video allow to access to the motion information.
Computer Vision 3D: Static computer vision 3D provides data in three dimensions (3D) which are the coordinates of the object (x,y,z).