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WARBLER is a field acoustic playback and recording instrument designed for wildlife research and nature recordings. Developed in conjunction with wildlife researchers at Oregon State University, this device has been developed specifically for long-term field studies with serviceability in mind. The dynamic scheduler can be programmed to trigger audio playback and recordings at specific times of the day, and can also be synchronized to sunrise and sunset times.
The unit features two microphones for true 360 coverage, a full-spectrum playback speaker, and large capacity and eco-friendly battery pack. Each element of this designed was developed from the ground up to provide a robust user experience while providing premium recording capabilities for field applications.
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This system incorporates a complete audio playback system capable of scheduled playback. Audio is delivered from the micro-SD card which can be stored in various formats including MP3, OGG, or uncompressed WAV. The playback is triggered from a configuration file based on the internal real-time clock and can be offset for sunrise and sunset times based on an internal lookup table.
Decoding is handled by an on-board DSP which feeds the integrated Class-D amplifier.
Volume is digitally controlled and can be set from the configuration file.
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The system has a single 4″ speaker with a drive capable of over 100-dB. The full-range driver was carefully selected for its wide spectrum frequency response curve to accurately re-produce the audio. This is a crucial design aspect for quality audio reproduction as most loudspeakers have a tendency to distort or clip higher frequency ranges. This speaker has a full frequency response from 80Hz to 16Khz and features a nearly flat uniform response from 100Hz up to 10KHz.
The wide-cone angle minimizes power loss and can project sound while providing maximum coverage in an area.
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Wabler users a custom designed Lithium Iron Phosphate battery.
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