Composite nervous action potential turning curve calibration and detection system

Abstract

The invention relates to a composite nervous action potential tuning curve calibration and detection system. The composite nervous action potential tuning curve calibration and detection system is characterized by comprising a computer, an acoustic card, an acoustic sensor, a preamplifier, an electrode, a high-impedance input level, a bioelectric amplifier and earplugs. An audition testing platform is arranged in the computer and comprises a testing executing system and an acoustic card driving system, wherein the testing executing system comprises a plurality of calibration and detection modules. A system calibration and debugging module is used for calibrating and debugging the acoustic card and sensitivity of the acoustic sensor. An acoustic sensor position calibrating module is used for calibrating a position of the acoustic sensor testing an external auditory canal of an animal. An electrode position calibrating module is used for calibrating whether a recording electrode is disposed to testing round window membranes in the animal ears or not. A composite nervous action potential threshold curve detection module is used for testing stimulus intensity thresholds of composite nervous action potentials. A composite nervous action potential tuning curve detection module is used for detecting composite nervous action potential tuning curves. The composite nervous action potential tuning curve calibration and detection system can be widely applied to auditory detection.

Description

technical field

[0001] The invention relates to an auditory detection system, in particular to a sound card-based compound nerve action potential tuning curve calibration and detection system. Background technique

[0002] The compound nerve action potential (CAP) is the cochlea is subjected to transient acoustic stimulation, and after a certain latency period, the sum of the discharges of thousands of individual auditory nerves is recorded through the round window membrane in the ear canal. The synchronicity of the activity of each nerve fiber is a basic condition for whether the round window membrane can record CAP. In order to effectively induce a synchronous response of a large number of nerve fibers, the acoustic signal must have better transient characteristics, that is, a shorter rise / fall time. Because the click or tone burst has better transient characteristics, it is often used to induce CAP. The time domain of Click is a very narrow rectangular pulse with a wide...

Images