{"product_id":"sound-calibrator-extech","title":"Sound Calibrator Extech","description":"\u003ch2 style=\"text-align: center;\"\u003e\nExtech 407744 and 407766 Sound Level Calibrators\n\u003c\/h2\u003e\n\n\u003ch4 style=\"text-align: center;\"\u003e\nStandard Acoustic Reference Systems with 94 dB and 114 dB Options for Precise Sound Level Meter Calibration in Bioacoustic Research and Environmental Monitoring.\n\u003c\/h4\u003e\n\n\u003cp style=\"text-align: justify;\"\u003e\nThe Extech Sound Level Calibrators (Models 407744 and 407766) are high-precision metrology instruments designed to ensure the accuracy and reliability of sound measurements in environmental monitoring, urban ecology, and bioacoustic research. Accurate calibration is essential for collecting dependable acoustic data from wildlife habitats, natural soundscapes, and industrial environments. These calibrators comply with the IEC 60942:1997-11 international standard, providing a stable and repeatable acoustic reference for demanding field and laboratory applications.\n\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003e\nThe series includes two models to accommodate different calibration requirements. The Model 407744 produces a fixed 1 kHz sine wave at 94 dB and features a dedicated LED battery status indicator for quick operational checks. The Model 407766 offers greater flexibility through a three-position switch that selects either 94 dB or 114 dB sound pressure levels, making it ideal for calibrating sound level meters used in environments with higher ambient noise. Both models are designed to fit standard 0.5 in (12.7 mm) and 1 in (25.4 mm) microphones, providing a secure acoustic seal for accurate calibration.\n\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eStandardized verification and calibration for maximum sound level meter accuracy.\u003c\/li\u003e\n\u003cli\u003eCompatible with standard 0.5 in (12.7 mm) and 1 in (25.4 mm) acoustic microphones.\u003c\/li\u003e\n\u003cli\u003eProduces a pure 1 kHz sine wave with less than 2% total harmonic distortion.\u003c\/li\u003e\n\u003cli\u003eRugged, portable design with integrated LED indicators for battery monitoring.\u003c\/li\u003e\n\u003cli\u003eNIST-traceable calibration versions available for scientific, regulatory, and environmental auditing applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca href=\"#tab1\" class=\"active\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab2\"\u003eIn the Box\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab3\"\u003eRequired Items\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab4\"\u003eOptional Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab5\"\u003eDocuments\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\" style=\"text-align: justify;\"\u003e\n\n\u003cli id=\"tab1\" class=\"active\"\u003e\n\u003ctable style=\"width: 80%; margin: auto; height: auto;\"\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eModel 407744\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eModel 407766\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFrequency\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e1000 Hz (±5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSound Pressure Level\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e94 dB (±0.5 dB)\u003c\/td\u003e\n\u003ctd\u003e94 dB \/ 114 dB (±0.5 dB \/ ±1.0 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eTotal Harmonic Distortion (THD)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u0026lt;2% at 94 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOperating Temperature\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e0 to 50 °C (32 to 122 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePower Supply\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eTwo 9 V Alkaline Batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePower Consumption\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eApproximately 10 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eDimensions\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e5 cm Diameter × 12.7 cm Length (2.2 × 5.6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eWeight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e0.34 kg (340 g \/ 0.75 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli id=\"tab2\"\u003e\n\u003cul\u003e\n\u003cli\u003e1× Sound Level Calibrator (Selected Model)\u003c\/li\u003e\n\u003cli\u003e2× Heavy-Duty 9 V Alkaline Batteries\u003c\/li\u003e\n\u003cli\u003e1× Calibration Screwdriver\u003c\/li\u003e\n\u003cli\u003e1× Hard Carrying Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli id=\"tab3\"\u003e\n\u003cp style=\"text-align: justify;\"\u003eNone: Ready to Use!\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli id=\"tab4\"\u003e\n\u003cul\u003e\n\u003cli\u003e407744-NIST: NIST-Traceable Calibration Certification\u003c\/li\u003e\n\u003cli\u003e407766-NIST: NIST-Traceable Calibration Certification\u003c\/li\u003e\n\u003cli\u003eExtech Sound Level Meters and Acoustic Measurement Instruments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli id=\"tab5\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0339\/7965\/files\/407744_407766_DS-en.pdf?v=1599854649\" target=\"_blank\" title=\"Extech 407744 and 407766 Sound Level Calibrators\" rel=\"noopener\"\u003e\nTechnical Datasheet (English)\n\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e","brand":"Extech","offers":[{"title":"94 dB","offer_id":45918652530771,"sku":"EXTE-407744","price":0.0,"currency_code":"USD","in_stock":true},{"title":"94\/114 dB Without NIST Certification","offer_id":45918652563539,"sku":"EXTE-407766","price":0.0,"currency_code":"USD","in_stock":true},{"title":"94\/114 dB NIST Certified","offer_id":45918652596307,"sku":"EXTE-407767NIST","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0228\/9323\/files\/1_75351cb5-ea1b-4783-9c7d-8af3904a12f6.png?v=1786080884","url":"https:\/\/www.global.bioweb.co\/pt\/products\/sound-calibrator-extech","provider":"BIOWEB USA","version":"1.0","type":"link"}