@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . rdf:type skos:Concept ; dce:identifier "SDN:L22::TOOL1658" ; dc:date "2021-03-23 16:02:18.0" ; dc:identifier "SDN:L22::TOOL1658" ; pav:authoredOn "2021-03-23 16:02:18.0" ; pav:hasCurrentVersion ; pav:version "1" ; void:inDataset ; owl:deprecated "false" ; owl:versionInfo "1" ; skos:altLabel "GeoSpectrum M8" , "GeoSpectrum M8"@en ; skos:broader , ; skos:definition "A high-frequency omni-directional hydrophone and sound projector for use in the marine environment. It can be purchased with or without a pre-amplifier, and can be packaged in various ways tailored to the users' application. It has a diameter of 22 mm and length of 110 mm (single package). It is depth-rated to 3500 m and can operate at temperatures between -40 and +70 degC. Its acoustic sensitivity (1 kHz) is -200 dBV re 1uPa (unamplified). It has a frequency range from 1 Hz - 150 kHz, (+/- 5 dBV) and an electro-acoustic efficiency of 80 % at resonance. It's bandwidth (-3 dB) is 30 kHz."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL1658" ; skos:note "accepted"@en ; skos:prefLabel "GeoSpectrum M8 hydrophone"@en ; skos:related , .