Abstract:

In order to properly select instrumentation for bioacoustic studies, a list of measurable criteria must be drawn up, but even that may not suffice unless some genuine thought is given to the possibility of mapping additional criteria, such as frequencies beyond the range usually considered. In the planning and design of the experiment, some of the criteria include: frequency and dynamic ranges, the number of channels desired (not necessarily always available!), compatibility of components (as exemplified by the matching of acoustical and electrical impedances), setup of sensing/receiving transducer arrays, mode of recording, statistical methodologies, usable computer prowess, etc. Environment constitutes an extremely important factor from two aspects: (1) It should not be adversely affected by the use and operation of the equipment; and (2) the equipment should be able to withstand rigors of temperature, humidity, vibration, and shock. Provision should be made for instrument calibration at proper intervals to ensure the integrity of obtained data. Cost is another factor that can determine the reliability of the equipment, quality of performance, ruggedness, and ease of operation.