Paul, I think your analysis shows BT does not match a wired connection.
44K * 16b = 704kb/s, roughly double 328kb/s
And that's assuming a perfect signal - no packet loss. Now, if you
transmit MP3, which is highly compressed, you probably could use BT just
fine. But, personally, I can hear the difference between MP3 and
uncompressed for some types of music, like classical.
Peri
------ Original Message ------
From: "paul dove via EV" <ev@lists.evdl.org>
To: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Cc:
Sent: 17-Dec-16 3:13:11 PM
Subject: Re: [EVDL] OT: Re: Leafs too cheap
Typically, the full range of hearing can be reproduced using the
frequencies from 20 Hz to 20 KHz. Sound must be sampled at least double
the highest frequency present that needs to be reproduced, 44.1k (twice
20 kHz plus a little extra) samples/second for good music quality.
The average human ear can differentiate approximately 90dB of range
from the softest sounds to the loudest. Eight bits gives 48dB of range
while 16 bits gives 96 dB of range and is often used for sampling
digital audio.
Modern BT can achieve 328kb/s easily competing with wire.
Sent from my iPhone
On Dec 17, 2016, at 10:23 AM, EVDL Administrator via EV
<ev@lists.evdl.org> wrote:
On 17 Dec 2016 at 8:36, paul dove via EV wrote:
The human ear cannot usually detect the differences
Not to send this too far off topic, but it depends on WHOSE ear.
It's an
individual matter. For example, I don't consider myself a
"golden-ear," but
I seem to be unusually sensitive to data compression artifacts in
audio. I
can definitely hear the difference.
That said, in a moving car, the noise masks a lot of the difference
--
though probably less in an EV with no enginre noise.
David Roden - Akron, Ohio, USA
EVDL Administrator
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