ETMC Technologies :: G.R.A.S. Sound & Vibration :: The Intensity Coupler Type 51AB is a coupler for calibrating the phase response of microphone pairs used for measuring sound intensity, e.g. the Type 40AI and Type 40BI.

<H1>No Frames? No Problem!</H1> <p><br>Go to G.R.A.S. Sound & Vibration web site with <A HREF="http://www.gras.dk/00012/00134/00138/00142/">no-frames</A>.</p> <p>The Intensity Coupler Type 51AB is a coupler for calibrating the phase response of microphone pairs used for measuring sound intensity, e.g. the Type 40AI and Type 40BI. <p>It includes a calibrated acoustic resitance to enable the computation of particle velocity and intensity levels. <p>The Type 51AB complies with the standards of IEC 1043. <p><p>Specifications Type 51AB <p>Input connector: BNC socket <p>Maximum input signal: 1 V RMS <p>Frequency range: 50 Hz - 6.3 kHz <p>Frequency-intensity index: >27 dB (nomin. mic. spacing 25 mm) <p>SPL difference between channels: < 0.1 dB <p>Operating temperature range: + 5 °C to + 40 °C <p>Dimensions: <p>height: 42.2 mm <p>width: 50.3 mm <p>depth: 60.0 mm <p>Weight: 515 g <p>Accessories included: 2 × ¼" microphone adapters