BlueVox2 Headset Nashville TN

This article offers a look at the BlueVox2 Headset, a product which features noise cancellation and dual-microphone channels.

Local Companies

Civil & Environmental Consultants, Inc
615-333-7797
405 Duke Drive
Franklin, TN
Civil & Environmental Consultants, Inc
615-333-7797
405 Duke Drive
Franklin, TN
Highers Koonce & Associates Inc
(615) 333-7200
3343 Perimeter Hill Dr Ste 102
Nashville, TN
Wood Engineering Consulting Engineers
(615) 831-1772
3221 Nolensville Pike
Nashville, TN
Buchanan Consulting Engineers
(615) 292-2992
1601 17th Ave S
Nashville, TN
Pbs & J
(615) 367-6610
402 Bna Dr
Nashville, TN
Environmental Resources Management-Southeast Inc
(615) 373-3350
7106 Crossroad Blvd
Nashville, TN
Neel-Schaffer Inc
(615) 383-8420
210 25th Ave N Ste 800
Nashville, TN
James & Associates
(615) 726-4848
1 Vantage Way
Nashville, TN
Stigall Engineering
(615) 460-7515
4117 Hillsboro Pike
Nashville, TN

provided by: EDN

In the world of Bluetooth-headset design, every cent of the BOM (bill of materials) counts. With that fact in mind, CSR has introduced single-chip devices with BOM figures of $5 and $6. The BlueVox2 headset costs $5, and the extra $1 adds DSP for active noise cancellation to remove ambient sounds from the microphone channel. The company?s Kalimba block adds the DSP function, with either single-microphone operation or dual-microphone channels; the second microphone is for ambient noise and adds just a few cents to the cost. The DSP code is in ROM, also lowering costs.

The chip operates to Bluetooth 2.1 EDR (enhanced data rate) and implements the company?s AuriStream codec for improved voice quality and lower power when both ends of the link can use it or autonegotiates to fall back to a standard codec if not. Power management, including battery charging, is on-chip; the Bluetooth core is CSR?s Bluecore5 block, and the control processor is an XAP2+ + RISC core from Cambridge Consultants (www.cambridgeconsultants.com). A reference design is available; it includes not only complete layout and component information, but also a built and working example. Power demand is 11 to 14 mA at 3.7V, depending on the codec in use. Transmitter power is 8 dBm, and receiver sensitivity is 290 dBm. These figures provide greater link robustness and avoid cross-body signal-loss dropouts, according to the company. The non-DSP version has similar RF performance and power requirements of 6.5 to 8.5 mA.

ECSR, www.csr.com.



author: by Graham Prophet

EDN. Copyright © 2008 Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

Featured Local Company

Civil & Environmental Consultants, Inc

615-333-7797
405 Duke Drive
Franklin, TN

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