Windows Phone 7 麦克风可以检测 18k-19kHz 范围内的频率吗?
Windows Phone 7 内置麦克风可以检测到高于 18kHz 的频率吗?
Can the windows phone 7 in-built microphone detect frequencies higher than 18kHz?
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从技术上讲,是的,API 支持以足够的质量记录 PCM,以表达 18kHz 正弦波。标准 POTS 线路甚至 T1 线路通常以 8 kHz 16 位运行,这在数学上足以正确记录最大 4 kHz。由于麦克风通常不用于比电话音频更高质量的东西,我敢打赌限制因素将是硬件......您的里程肯定会因手机而异。
Technically yes, the API supports recording PCM with sufficient quality to express a 18kHz sine wave. Standard POTS lines and even T1 lines generally operate at 8 kHz 16 bit which is mathematically enough to correctly record a max of 4 kHz. And since the mic isn't usually used for anything higher quality than telephony audio, I bet the limiting factor will be the hardware... your mileage will definitely vary from phone to phone.