ACCO Brands M01042-V 사용자 설명서

 

Document 

PES-K33440 Rev

March 27, 2008

 
 

 

Page 9 of 19

 

•  Other ambient noises 

o 

The prime audio solution (firmware based) for ET will be provided by Primax 

o 

Echo rejection:   >42 dB 

o 

Convergence in presence of back ground noise:  < 1.0 sec 

o 

Noise Cancellation:  12 dB 

o 

No Distortion or speech clipping 

o 

Comfort noise injection for natural sounding conversations 

o 

Enhanced Non-linear processor for suppression of residual echo 

o 

Microphone: 

•  Omni directional microphone to be used 

•  To be isolated via a rubber “boot” to prevent vibration transmission 

•  Not to be rigidly mounted to the PCB, should be mounted to the plastics 

and attached to the PCB via flying leads 

•  RF filtering a must to reduce TDMA noise issues 

•  6mm diameter microphone to be used 

•  Microphone SNR to be min 55 dB 

•  The microphone is to be located on the front face plate for optimum user 

orientation.   

•  Sensitivity greater than -45 dBV at 1KHz 

• 

Reference Microphone:

 

• 

Kingstate Microphone with flying leads.

 

• 

KECC2244WBL-G9U 

 

 

 

 

Visor BT handsfree Product will ship along with: 
- 2 rectangular NiMH battery packs with contacts (no flying leads) 
- USB battery charger  
-CLA – USB power adapter 

-Must meet 3.3 Power requirements 
-Rectangular battery enclosed in plastic (user replaceable) 
-Clean look.  Shrink wrapped battery packs are not acceptable. 
-800mAh 
-NiMH Chemistry 

 -Includes NiMH charging circuit for Battery pack. 
-Includes cavity to accept NiMH Battery Pack 
 

-

Plugs into 12V power socket of car 

-Fused 2AMPS SMT Quick burn 
-Includes USB Power circuit which meets the following iPhone 5V power requirements 
(Kensington will provide proven reference design to meet these requirements:

 In order to reduce PCB space an SMT type fuse it to be used, rated to 2 Amps.