ACOUSTICAL BIRD MONITORING SYSTEM - ELECTRONIC EQUIPMENT Daniel Król, Robert Wielgat, Tomasz Potempa, Agnieszka Lisowska-Lis Department of Technology, State Higher Vocational School in Tarnów,

Digital audio recorder Radio commu-nication module Electronic Equipment in Acoustical Bird Monitoring System – Block Diagram Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Environmental protection becomes nowadays more and more important issue in government policy of many countries. One of the crucial aspects of this policy is protection of avifauna biodiversity. In order to protect bird species especially species endangered with extinction an acoustical bird monitoring system has been proposed.

Multi-channel Digital Audio Recorder Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Multi-channel digital audio recorder is the system component enabling bird voices recording. Recorded voices are afterwards automatically recognized by the recognizer in order to label bird species.

Multi-channel Digital Audio Recorder – Block Diagram Keyboard Control Processor LCD Display Control Board DSP Processor L Front Left PGA ADC DAC R Front Right PGA ADC DAC Rear Left PGA ADC Headphones SDHC CARD Rear Right PGA ADC DSP Board Features: 4 audio-channel with digitally controlled programable gain amplifiers (PGA) and ultra-linear succesive aproximation register A/D converters (ADC) 32-bit DSP with ARM7 core which processes the signals from A/D converters. 8-bit AVR microcontroller for controlling recorder, keyboard and LCD display. Signals saved in uncompressed WAV format onto SD/SDHC memory card up to 32 GB 1, 2, and 4-channel recording modes Bit resolution 16 bit/sample per channel, maximal sampling frequency 96 kHz. Two D/A converters and headphones amplifiers in order to monitor recorded sounds.

Digital audio recorder Radio commu-nication module Microphone Array Digital camera Digital camcorder Attracting device Database system Weather station GPS Positioner Expert system Recognizer Digital audio recorder Radio commu-nication module Microphone array Digital Audio Recorder is capable to control 4 microphone array. properly designed algorithm of processing the signals from microphone arrays e.g. time difference of arrival (e.g. TDOA) helps to improve quality of digitized acoustic signal coming from chosen direction or point.

Bird Attracting Devices Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Power amplifier Keyboard DAC Microcontroller/ DSP LCD Display SDHC CARD Bird attracting device can help to discover if birds of specific species are in the area of interest. Features: Playback of signals stored on the SD/SDHC card. 32-bit microcontroller/DSP with ARM7 core. big LCD display and user-friendly menu for quick access to the given sound signal built-in amplifier, and external loudspeaker Played signal has 16-bit resolution and 96 kHz sampling rate.

Digital audio recorder Radio commu-nication module Digital Camera Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Digital camera equipped with telephoto lens gives detailed view of observed bird. It helps further to recognize the bird species in order to save the information in data base.

Digital audio recorder Radio commu-nication module Digital Camcorder Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Mobile camcorder Stationary camcorder Movies registered by digital camcorder sometimes enable to combine recorded bird voice with bird individual registered on the movie.

Digital audio recorder Radio commu-nication module GPS Positioner Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array External GPS positioner Built-in GPS positioner The positioner allows to write GPS data using XML format describing exact recording position.

Radio Communication Module Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Optional radio communication module allows wireless control of digital audio recorder. In may be built-in the audio recorder. The person standing in the distance may switch it on and off in any time, with the remote control.

Portable Weather Station Database system Expert system Recognizer Digital audio recorder GPS Positioner Weather station Attracting device Digital camcorder Digital camera Radio commu-nication module Microphone array Portable weather stations are designed to monitor outdoor temperature, humidity, barometric pressure, wind speed, rainfall and chill factor. In the system it is possible to connect cabled models to personal computer by RS232 interface, or USB interface.

Conclusion Modern scientific biology in different terrains requires different electronic devices Connecting electronic devices into the data-base system can further improve quality and effectivity of the research to be carried out. The electronic equipment of the acoustical avian monitoring system has been presented. At the present stage of work high quality digital audio recorder and partially bird attracting device have been built External stationary camcorder for bird monitoring purposes has been installed Properly designed microphone array still remains the problem to be solved.

Lanius collurio – red-backed shrike Acknowledgment Described work is financed from grant of Polish Ministry of Science and Higher Education number N N519 402934. Lanius collurio – red-backed shrike

THANK YOU VERY MUCH FOR YOUR ATTENTION For more information visit project website: www.birdsmond.pwsztar.edu.pl