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Summary of Contents for MED Associates ANL-940-1
- Page 1 ULTRASONIC MICROPHONE AND AMPLIFIER ANL-940-1 USER’S MANUAL DOC-262 Rev. 1.2 Copyright ©2014 All Rights Reserved Med Associates Inc. P.O. Box 319 St. Albans, Vermont 05478 Phone: 802.527.2343 Fax: 802.527.5095 www.med-associates.com...
- Page 2 ANL-940-1 Ultrasonic Microphone and Amplifier notes - i - DOC-262 Rev 1.2 Copyright © 2014 MED Associates, Inc.
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Page 3: Table Of Contents
ANL-940-1 Ultrasonic Microphone and Amplifier Table of Contents Chapter 1 | Introduction ......................1 Specifications ........................... 1 Notes ............................... 1 Requirements ..........................1 Chapter 2 | Hardware ......................2 Chapter 3 | Operation ......................3 Appendix A ..........................6 Quantitative Analysis of Sound Pressure Levels ................6 Appendix B | Contact Information .................. -
Page 4: Chapter 1 | Introduction
The analog output can be connected to third party data acquisition systems. (e.g. National Instruments) Specifications The frequency response of the ANL-940-1 is linear (+/- 4 dB) up to 100 kHz. The analog output is +\- 14 Volts. The ANL-940-1 microphone and preamplifier combination are calibrated to provide 1 volt peak... -
Page 5: Chapter 2 | Hardware
A N L - 9 4 0 - 1 U L T R A SO NI C M I C R O P H O NE A ND A M P L I FI E R CHAPTER 2 | HARDWARE The ANL-940-1 includes a Microphone and an Amplifier. A power supply is also included, which provides a minimum of 12V, 500mA. The brand and type of power supply depends on the user’s country. -
Page 6: Chapter 3 | Operation
The ANL-940-1 has been pre-calibrated at the factory. Do not adjust the instrument gain if you will be using the ANL-940-1 to quantify the actual amplitude (dB) of rodent vocalization. Refer to Appendix A for more information regarding measurement of sound pressure level amplitudes. - Page 7 Med Associates, Inc. recommends using a National Instruments DAQ device, such as the myDAQ or ELVIS. The ANL-940-1 has been tested with this equipment. For connection from the ANL- 940-1 BNC connector to the National Instruments DAQ device, the center and ground can be screwed into the terminals.
- Page 8 The power supply has a 2.1mm connector and supplies 12V, 500mA. Insert the connector into the port on the back of the Amplifier and flip on the power switch. Figure 3.4 - Back View of ANL-940-1 Microphone Amplifier Insert power supply...
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Page 9: Quantitative Analysis Of Sound Pressure Levels
30 mV (0.03V), the equivalent pressure at 1 m would be 30 mV * 0.25 = 7.5 mV ( or 30mV / 4). Recall that the ANL-940-1 has a calibration scaling of 1 Pa/V. Thus, the equivalent sound pressure level at 1 m would be 0.0075 V * 1 Pa/V = 0.0075 Pa. - Page 10 In the case where r = 1 meter, @1 meter = L + 20 log(r Figure A.1 - Graph of 20 log(r ) for distances less than 1 meter - 7 - DOC-262 Rev 1.2 Copyright © 2014 MED Associates, Inc.
- Page 11 1 V peak causes the output of the A-to-D to saturate, reduce the amplitude of the test signal by a factor of ten to 0.1 V peak and replace the factor of +94 dB with +74 to compensate for the reduced signal level. - 8 - DOC-262 Rev 1.2 Copyright © 2014 MED Associates, Inc.
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Page 12: Appendix B | Contact Information
References: http://en.wikipedia.org/wiki/Sound_pressure#Sound_pressure_level APPENDIX B | CONTACT INFORMATION Please contact MED Associates, Inc. for information regarding any of our products. Visit our website at for contact information. www.med-associates.com For technical questions, email support@med-associates.com...
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