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Jeevan Karandikar, Li Gong, Alfonso Montilla, Jon Claros
Shu Chien-Gene Lay Department of Bioengineering
Introduction
Introduction
Echolocating marine mammals like dolphins rely on their hearing for navigation and foraging [1]. In response to increasing anthropogenic noise pollution, the U.S. Navy Marine Mammal Program (MMP) and the National Marine Mammal Foundation (NMMF) developed auditory evoked potential (AEP) methods to assess marine mammal hearing [2]. However, the current EVREST system is quite bulky for field research. This project presents a compact biopotential amplifier to support research and conservation.
Problem Statement
Problem Statement
Current systems are bulky, making transport difficult and inconvenient in field research. This project aims to develop a compact, portable, high-performance amplifier board that remains compatible with existing software to support marine mammal hearing tests.
Specifications
Specifications
Amplification: x50,000
Filters:
Low Pass: 4-pole (-24 dB/octave), 3 kHz
High Pass: 2-pole (-12 dB/octave), 300 Hz
Input Characteristics:
Input impedance: 20 megohm, differential
Output:
Type: Single-ended, clipped at 10 V pk-to-pk
Output Impedance: 500 ohms
Power: +- 12 V
References
References
[1] D. S. Houser, "Testing Marine Mammal Hearing via Evoked Potential Audiometry," American Speech-Language-Hearing Association, 2014.
[2] J. J. Finneran, ”Evoked response study tool: a portable, rugged system for single and multiple auditory evoked potential measurements,” J. Acoust. Soc. Am., vol. 126, no. 1, pp. 491–500, Jul. 2009, doi:10.1121/1.3148214.
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