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

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

10. 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.

11. 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.

12. 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.

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

14. THANK YOU VERY MUCH FOR YOUR ATTENTION
For more information visit project website: