Why the New BenQ TreVolo U Speaker might be a great accessory to your radios!

[@reedreamer9518]

I just built an amplified speaker with a M7 based DSP with 16-bit ADC and spectrum noise reduction algorithm programmed in C/C++. It took me months to design and built, but it really does reduced the noise and expand the dynamic range of the human voice.

[@PrecisionGroupYT]

That sounds awesome and I bet it literally sounds awesome as well! 73

[@reedreamer9518]

​@@PrecisionGroupYT That BenQ does sound pretty good too. Before building my own, I looked at all the commercially available options I could find and that BenQ might be the best I've heard yet. My spectrum NR algorithm does have the curious feature of creating artifacts that sound like that of distant water dripping off a roof when there is no human voice present -- lol. But as long as there is some voice as a reference, it immediately adapts and sounds clear, sharp and free of noise. For separating the human voice from the noise, it really does the job. My device is of course experimental. It is also quite versatile and I've got it built into a proper case with individual knobs for adjustments and a color TFT display with a nice frequency domain spectrum graph -- very useful for "looking" at the sound. I currently have several different NR algorithms for different modes, and I can always modify the code and try new things in the future, which is all part of the fun. After realizing the potential of DSP NR, I do wonder why they don't build better NR functionality into ham rigs. Considering that the 705 (and my 7300 too) really does needs an amplified external speaker anyway, I guess ~$210 for that BenQ isn't too much to spend to get better sound.

[@j.annsingleton6909]

Interesting that it does so much and seems to do it very well.

[@flobartholomew8031]

Great video 😊

[@PrecisionGroupYT]

Thank you for your support as always!!