Ann: AGM Presentation, page-58

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BobLoblaw

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26/05/21

11:46

Post #: 53423811
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Originally posted by BobF: ↑

All interesting observations guys. Thanks for posting.

1 2-4 chips may give coverage of all voice frequency spreads, but I think more will be required to cover all instrumental and natural environmental highs and lows out to the limits of human hearing. Then there is loudness. If you are playing the sounds of an action movie with e.g. explosions and earthquake sub-sonics you will not only want low frequencies but lots of amplitude too - i.e. SPL. I would guess something like 60-80dB desirable capacity. That sounds like 32-64 chips needed.

2 p16 of the presentation shows some readouts from the testing. The matrix shows modelling based on 9x9 chips. This is only slightly different from the demo device 8x10. I note first that the frequency response is fairly flat over 20-1000Hz for 1 chip (red dot), and the SPL = ~32dB. This is also shown on the colour coded graphics. Beyond 1000Hz there is a lot of nonlinearity of SPL. While I am not sure what the implications are from this last point, I imagine that the idea of ~32dB SPL output per chip is a good place to start. If SPL increases by 6dB for each doubling of chips that implies:

1 chip = 32dB
2 chips = 38dB
4 chips = 44dB
8 chips = 50dB
16 chips = 56dB
32 chips = 62dB
64 chips = 68dB
128 chips = 74dB

That also agrees with the claim of "SPL >70dB at 1m" from the presentation to be achieved on the production version due this year. It also echoes the comments made by Danny a while back and talked about in earlier presentations of a sub woofer the size of a beer coaster (~8 x 8 cm2).

I agree with the idea of sound bars being the first place we are likely to see the product used. Vendors do not need to be producing huge numbers of units to be successful in the market. They can also be quick to market for novel top end products and may be prepared to achieve lower margins and still be very successful. Add in some or all the capabilities AP makes possible and that makes for a good range of new formats of sound delivery to get the product out there and its potential seen. Interesting days ahead.

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To me it looks like the 32db figure refers to an off-axis (55.7deg) reading.

If anyone who went to the agm can remember what was in the blurred out graph on that slide please feel free to share

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Ann: AGM Presentation, page-58

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Ann: AGM Presentation, page-58

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