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classroom, but gives recordings with albidue quantization noise. The voice bandwidth is 7 kHz (better than telephone, but worse than FM radio), and the encoding (I believe) is 4-bit ADPCM. I estimate the SNR to be about 40-45 dB, similar to a medium-quality voice memo recorder. That's one big difference between this and the $500+ wireless mics from professional mic manufacturers like Sennheiser and Shure. However, the quality is fine for reinforcing and recording speech, and the ease of setup and use, and tiny size and weight of both mic and base-station/USB interface, make this a very nice product.
This review is from: Microphone I bought this mic for sound reinforcement in the classroom after the students at the back of the room complained that my voice was trailing off during lectures. Now I simply clip the mic to my collar, plug the USB into my laptop, and my voice is projected over the room’s AV system. It was effortless to set up and use on my Mac. I also record my lectures: I was using a separate battery-operated voice recorder, which meant I had to juggle SD cards after class to copy the files onto my laptop; now, I use Audio Hijack Pro to capture the audio stream coming off the xTag. Everything works very smoothly.
My only reservation concerns audio quality. This device is based on the DECT standard that is the basis of most current cordless phones. As such, it uses a pretty low bitrate, and a fairly simple digital encoding scheme. The result is a voice signal that is fine for projecting in a (relatively noisy) classroom, but gives recordings with audible quantization noise. The voice bandwidth is 7 kHz (better than telephone, but worse than FM radio), and the encoding (I believe) is 4-bit ADPCM. I estimate the SNR to be about 40-45 dB, similar to a medium-quality voice memo recorder. That’s one big difference between this and the $500+ wireless mics from professional mic manufacturers like Sennheiser and Shure. However, the quality is fine for reinforcing and recording speech, and the ease of setup and use, and tiny size and weight of both mic and base-station/USB interface, make this a very nice product.
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