Hi You might find this useful
Romero-Vivas, E. and León-Lopez Braulio. 2010. Construction, Calibration, and Field Test of a Home Made Low Cost Hydrophone System for Cetacean Acoustic Research. Acoustical Society of America, 2n PanAmerican/Iberian Meeting on Acoustics. Marine Mammals are reliable bioindicators of aquatic ecosystems health. Since cetacean highly relay on the use of sound for conspecifics interaction, feeding, and navigation, research in bioacoustics becomes fundamental to unravel the influence of anthropogenic activities on their environment and vocal behaviour. Unfortunately, the widespread of studies in this area are often limited for the lack of affordable equipment. This paper first describes how to build a low cost hydrophone suitable for cetacean acoustic research and then shows how to perform hydrostatic pressure tests and acoustic calibrations using easily available tools. Finally, field recordings of individuals of two dolphin species: long-beaked common dolphin (Delphinus capensis) and bottlenose dolphin (Tursiops truncatus) in La Paz Bay, Baja California Sur, Mexico using the proposed hydrophone and a professional hydrophone system [AQ-1s and ITC-1042 transducers (10 Hz - 100 kHz)] are compared. © 2011 Acoustical Society of America free PDF (full text): http://asadl.org/poma/resource/1/pmarcw/v11/i1/p010001_s1?bypassSSO=1 Regards On Fri, 6 Apr 2012 13:13:50 +0200, [email protected] wrote > Dear list members, > we are looking for some low-cost hydrophones and > I'll be glad to hear some suggestions from you. > > I just stumbled upon this: > http://www.aquarianaudio.com/h2a-xlr-hydrophone.html > and was wondering if someone here has some opinion > about it. The price (~200usd) is what we thought to > spend. > > Thanks in advance, > Gianluca _________________________________________________________ Dr. Eduardo Romero Vivas Acústica y Procesamiento Digital de Señales Centro de Investigaciones Biológicas del Noroeste, S.C. http://www.cibnor.mx/es/investigacion/grupos-de-investigacion/grupo-de- bioinformatica/inicio CIBNOR
