ETMC Technologies :: G.R.A.S. Sound & Vibration :: Sound Calibrator Type 42AB is a portable, battery operated calibrator which produces a constant sound pressure level of 114 dB re. 20µPa (equivalent to 10 Pa) at 1 kHz. It is easy to use and requires no corrections for ambient pressure changes or microphone equivalent volume.

<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/00012/00057/00151/00154/">no-frames</A>.</p> <p>The Sound Calibrator Type 42AB is a portable, battery operated calibrator which produces a constant sound pressure level of 114 dB re. 20µPa (equivalent to 10 Pa) at 1 kHz. It is easy to use and requires no corrections for ambient pressure changes or microphone equivalent volume. <p>It includes adapters for calibrating 1", ½" and ¼" microphones. The Type 42AB complies with the requirements of IEC 942 (1988) Class 1. <p><p>Specifications Type 42AB <p>Sound pressure level: 114 dB (re. 20 µPa) ± 0.2 dB <p>Frequency: 1 kHz <p>Temperature range: - 10 °C to + 50 °C <p>Batteries: 6LR61, 9 V <p>Accuracy: IEC 942 (1988) Class 1 <p>Weight: 220 g