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Dynamic range considerations when designing PC sound card based audiometric systems to test human hearing

机译:设计基于PC声卡的测听系统以测试人耳时的动态范围注意事项

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摘要

An investigation into maximizing the dynamic range of a PC sound card based audiometric test system is presented. Two principle sound paths are characterized: a) the analog line input, and, b) internal waveform conversion from digital formats into analog signals. Each signal path's electrical performance and overall dynamic range is measured using audio harmonic distortion analysis and frequency spectrum analysis tools. Recommendations are made for proper combinations of signal amplitude and mixer attenuation settings to maximize overall system dynamic range. This work could be useful for scientists using PC sound card based systems for psycho-acoustic testing purposes or for those using similar systems attempting to test the full range of human hearing.
机译:提出了对最大化基于PC声卡的听力测试系统的动态范围的研究。表征两个主要的声音路径:a)模拟线路输入,b)内部波形从数字格式转换为模拟信号。使用音频谐波失真分析和频谱分析工具来测量每个信号路径的电气性能和整体动态范围。提出了适当组合信号幅度和混频器衰减设置的建议,以使整个系统动态范围最大化。这项工作对于使用基于PC声卡的系统进行心理声学测试的科学家或使用类似系统尝试测试整个人类听力的科学家而言可能是有用的。

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