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My colleague made a test of the audio quality in various Bluetooth car kits. I know he tryed out the Motorola Bluetooth Car kit and SonyEricsson's kit as well. I'm not shure if Nokia had one there too.
In his opinion the Motorola kit was a shure winner. You might ask yourself why: DSP on the mic. The Motorola kit has a DSP unit connected to the Mic that removes extra noise. He called me while using the Motorola Car kit and it sounded like he was sitting in his office.
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Posted: 2003-04-01 20:19:00
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and the Ericsson? was there a lot of noise or echo?
Do you know if the kits can work with more than one phone automatically (without re-pairing each time you change phones)? What would happen if phone#2 receives a call while the kit is taking a call on phone#1.
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Posted: 2003-04-02 01:44:00
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The SonyEricsson didn't wipe out the background noise as efficiently as the Motorola car kit. I don't remember echo.
This is taken from SonyEricsson Global support:
If more than one phone is paired to HCB-30, what are the priority roles?
If no GSM communication is established the HCB-30 have no communication channel to any paired device.
When any paired device establishes a GSM connection, either receiving or setting up a call, a Bluetooth™ channel is established.
Setting up a call through HCB-30 is only possible with the last paired device.
The one (of maximum 5 paired device being inside the Bluetooth™ coverage area) that is to establish a GSM connection first, will get the Bluetooth™ channel. The other ones will get their GSM connection in their phones, not using HCB-30 at all.
However when the HCB-30 call is finished, it is possible to transfer any other ongoing call to the HCB-30. The last terminal paired is the only one that can be activated from the HCB-30 control panel (for VAD and transfer of sound).
So, if you have 2 phones paired to the carkit and one is using the carkit for a call it will stay there. The other phone will take the call it the phone.
The outcome of my colleague's test was that the functionality was similar, but Motorola won because of the DSP mic.
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Posted: 2003-04-02 02:20:00
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What kind of car was used for the test? The interior volume of the cockpit must affect the response...
Will he publish the results? I'd love to see a review of either product.
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Posted: 2003-04-03 18:24:00
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Your hands free Car Kit - whether it be fixed, Original, OEM, cheap and nasty or BT, all can prduce echo.
You have to make sure that the speaker is far enough away from the mic.
Echo is only created if the speaker and Mic are too close together.
On a Duplexing HF kit, where you can Listen and Talk at the same time... you only want the mic to pick up your voice, but if the speaker is too close or the volume is way too high, the mic will pick up the the output from the speaker and this is the echo you do not want.
Best to put the speaker in Passenger foot well near center console.
Put the Mic up on the Drivers A column (this is the the column between the winscreen and the drivers door)
I have a HCA-20 temporarily in my car... still have not fully wired it up.
At least I have mounted the cradle... it is fully functional and is powered from my ciggy lighter.
I had the speaker and mic just laying on the passenger seat and any call made had very bad echo. I threw the speaker into the passenger footwell and the mic wedged into my ashtray and there is no echo.
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Posted: 2003-04-06 13:42:00
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Quote:
On 2003-04-01 19:58, Strangely wrote:
Yes i also bought the Advanced mute kit
The advanced mute kit works well but the only problem with it is that it completly mutes the audio.
Is this advanced mute kit a SE product? Do you have a model number for it?
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Posted: 2003-04-07 07:08:00
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Can't remember the part # and even SE don't list it!
You can find it at this page though. -
http://www.sonyericsson.com/uk/spg.jsp?page=start&Redir=template%3DPS1%26B%3Die%26PID%3D8419%26LM%3DPSM_V
Or Here @ Expansys (Slightly cheaper) -
http://www.expansys.com/product.asp?code=AMM
[ This Message was edited by: Strangely on 2003-04-08 06:56 ]
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Posted: 2003-04-08 07:54:00
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Just thought I'd post a follow up. I purchased the HCB-30 bluetooth car kit, and installed it myself in my Audi TT. I put the microphone in the OEM location, which is a behind a small grille 6" aft of the rear view mirror, mounted the supplied speaker in the passenger footwell, and the control box under the dash on the drivers side, just above the dead pedal. All are completely hidden from view. The only visible part of the system is the samll control switch, which is on the dash just above the stereo. I took pictures but I'm not sure how to post them.
I'm happy to report that the system works very well; there is no audible echo and minimal background noise. The controls are easy to use and voice dialling works great. It would be nice to have caller ID announced, but from other posts here it seems that's not possible.
The only criticism I have is that switching phones is a pain. One of the reasons I wanted a bluetooth kit is that my wife always leaves her phone in her purse, then swerves all over the road trying to get to it when it rings. I assumed that once her phone was paired with the system, it would automatically connect whenever she used my car. Not true; if the kit was last connected to my phone, it looks for that phone and ignores hers (even though both phones are paired). To connect her phone, it's necessary to go into the bluetooth setup menu on the phone and tell it to connect to the HCB-30. Needless to say, she's not going to go through this every time she uses my car...
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Posted: 2003-04-30 18:02:00
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Ok I figured out the photo thing:
cockpit
The black thing in the corner is the speaker
Microphone
Black Box (need to tidy up the wiring)
Control
Control
[ This Message was edited by: Lewmar on 2003-04-30 17:47 ]
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Posted: 2003-04-30 18:43:00
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