A Compact Acoustic Recorder

This paper discusses the design and operation of a portable compact acoustic recorder. Designed to be used in arctic conditions for applications that require portable equipment, the device is configured to fit into a lightweight briefcase. It will operate for eight hours at -40 F with heat provided...

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Bibliographic Details
Main Author: Stein, Ronald
Other Authors: WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Format: Text
Language:English
Published: 1989
Subjects:
Recording and Playback Devices
Acoustics
*UNDERWATER ACOUSTICS
*ACOUSTIC RECORDING SYSTEMS
*TAPE RECORDERS
*UNDERWATER SOUND SIGNALS
*ACOUSTIC SIGNALS
ELECTRONIC EQUIPMENT
ALTERNATING CURRENT
COSTS
CLIMATE
ELECTRIC POWER
RECORDING SYSTEMS
CALIBRATION
HYDROPHONES
SUPPLIES
ASSEMBLY
BOATS
AMPLITUDE
DISTORTION
CONSUMERS
BOTTLES
ARCTIC REGIONS
HOT WATER
TAPE RECORDING
INTERFACES
TOOLS
ELECTRONICS
AUDIO AMPLIFIERS
FUNCTIONS
PORTABLE EQUIPMENT
PE62435N
WUDN496433
Arctic
Online Access:http://www.dtic.mil/docs/citations/ADA213581
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA213581
Description
Summary:This paper discusses the design and operation of a portable compact acoustic recorder. Designed to be used in arctic conditions for applications that require portable equipment, the device is configured to fit into a lightweight briefcase. It will operate for eight hours at -40 F with heat provided by a hot water bottle. It has proven to be an effective scientific tool in the measurement of underwater acoustic signals in arctic experiments. It has also been used successfully in warmer climates, e.g., in recording acoustic signals from small boats with no AC power. The acoustic recorder's cost is moderate since it is based on a Sony Walkman Professional (WM-D6C) tape recorder playback unit. A speaker and battery assembly and a hydrophone interface electronic assembly complete the system electronics. The interface assembly supplies a number of functions, including a calibration tone generator, an audio amplifier, and a hydrophone interface. Calibrated acoustic recordings can be made by comparing the calibration tone amplitude with the acoustic signal amplitude. The distortion of the recording is minimized by using a high quality, consumer tape recorder.

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