BlueVox2 Headset Honolulu HI

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

Local Companies

In+Form Design, Inc.
(808) 524-4711
P.O. Box 37400
Honolulu, HI
eco Power Systems / Electric Vehicle Technologies
808-484-2800
99-1374 Koaha Pl.
Aiea, HI
Life Cycle Engineering
(808) 839-4523
3375 Koaaoapaka St
Honolulu, HI
Miyagawa Vincent K
(808) 591-8181
Honolulu, HI
Appropriate Technology Hawaii
(808) 523-1284
PO Box 4063
Honolulu, HI
Shah & Associates
(808) 942-7878
425 Ena Rd
Honolulu, HI
Ema Inc
(808) 946-9578
1357 Kapiolani Blvd
Honolulu, HI
URS Corporation
(808) 593-1116
615 Piikoi St Ste 900
Honolulu, HI
Consulting Structural Hawaii Inc
(808) 945-0198
931 Hausten St Ste 200
Honolulu, HI
Brown and Caldwell Consultants
(808) 523-8499
119 Merchant St Ste 200
Honolulu, HI

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

In+Form Design, Inc.

(808) 524-4711
P.O. Box 37400
Honolulu, HI
www.ifdesigninc.com