Final Report on the Digital Audio Capture and Identification System (DACIS). SERDP: Advanced Biotelemetry for Resource Management on Military Lands (CS-759) Part II
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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The Digital Audio Capture and Recognition System DACIS is designed to be an animal mounted eventually bird borne system which records and analyzes animal noises automatically. While the DACIS is fairly complex, it is actually an advanced acoustic sensor from a system point of view. The goal of the prototype system is to be able to identify with a high degree of reliability 4 animal calls from a single or multiple species. A very limited number of tests were performed on the DACIS with four types of wolf calls that were named growls, howls, whines and barks. A threshold value of 17 was found to be optimal yielding no false positives and 25 false negatives I early testing. Later tests showed up to 50 false negatives but still no false positives with a threshold of 20 or lower.
- Biomedical Instrumentation and Bioengineering