How to choose a microphone for SR
On Nov 18, 8:43 am, campos wrote:
Hi,
I'm trying to do some research work in Speech Recognition. I just
notice that a good microphone is very important for the accurary rate.
It seems that USB headset with microphone is better. But it's too hard
for me to choose. Would you please recommend one for me? Price could
be $50 - $100. Thanks in advance!
The USB SR microphone I've used for several years with satisfactory
results is Andrea USB NC-7100. However, it requires a microphone
socket as well as the USB as it is fitted with a minijack for the
earphone's audio readback.
I've had other brands which didn't work as well, which is ironic as
the Andrea NC-7100 was essentially a "free" inclusion with IBM's
ViaVoice. I assume that the guys who wrote a speech recognition
programme eventually learned whatever there is to know about SR mikes
(1).
Note that even the NC-7100 is merely "satisfactory", not great. It
seems to me that at present SR applications depend more on the logic
of the software for a workable result than on the quality of the
mikes.
You don't say what sort of research into SR you want to do
(psychological, linguistic, technical, or possibly even medical) but I
confidently forecast that unless you have the patience of Job you will
soon be very frustrated with the quality of even the best available
mikes and just slightly less frustrated with the quality of the best
available software. I have used the best I could find, IBM's ViaVoice,
for years, and have never seen an error-free page; I can type and edit
3000 clean words in half the time it takes to dictate and clean up --
and that is on a good day. I guess a normal rate once you get the hang
of SR would be nearer 40% as fast as just using the keyboard from
scratch. SR is strictly for a) people who type with two fingers and
very slowly at that or b) ambidextrous multitaskers (I'm watching
MotoGP in a corner of my screen as I dictate this letter to you, while
polishing a novel in another window and listening to Sophie Yates play
the harpsichord on electrostatic earphones). In situations like b)
above, SR permits one to increase efficient use of time by adding an
additonal writing task or, at least theoretically, an additional
editing task to what one writes on a keyboard. The editing task is
strictly theoretical, because using SR to copy-edit material longer
than a couple of short pars will turn anyone into an axe murderer in
less time than it takes to read this sentence.
HTH. Good luck.
Andre Jute
Shock horror discovery! It's ViaVoice that makes me kick Poopie and
Bluster in the goolies.
(1) Meterhead bait x2
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