The results of experimental measurements of the scalar-vector characteristic of the acoustic field in a shallow water with carbonated bottom are analyzed. Simultaneous recording of sound pressure and three orthogonal components of particle velocity was carried out using a sound pressure receiver and a vector receiver. The source of the tone signal was a towed transducer; a noise signal from a passing ship was used as a source located near the water-air boundary. It is shown that in the spatial decrease of the sound field components, the significant variations in levels of sound pressure and particle velocity components are observed, regardless of the depth of the sound source. When the sound source is located at the depth of the water layer, the dependence of the spatial decrease of the acoustic field components is different, and when the noise signal source is located below the surface of the water-air interface, the character of the decreasing of sound pressure amplitudes and the vertical component of the particle velocity are the same throughout the measurement path.
43.58.+z Acoustical measurements and instrumentation
$^1$Acoustics Department, Faculty of Physics, Lomonosov Moscow State University, chair of Acoustics.
$^2$Shirshov Oceanology Institute of the Russian Academy of Sciences
$^3$Acoustics Department, Faculty of Physics, Lomonosov Moscow State University