[PLUG] Current state of Linux voice recognition

[Richard Owlett]

On 06/28/2017 09:54 AM, Larry Brigman wrote:
> Not really answering your question but providing important facts
> about the domain.
> Human voice frequency range tops out at 8khz.  Normal speech is around
> 2-3khz.  Any soundcard that samples at 48khz will work just fine.

<chuckle> That's the theory that's been around "forever".
I'm in possession of a factoid that prompts me to do some research 
needing high resolution at high sample rates.

For more than 60 years I've had significant high frequency hearing loss 
in one ear due to repeated ear infections in childhood. Forty years ago 
I consulted a major medical center in Boston at the prompting of a RN 
friend. The formal diagnosis was "nerve deafness" based on comparing my 
tests with headphones and a "bone conduction" setup. I personally 
suspect there are also complications attributable to scar tissue on the 
eardrum.

I date from the era when all males attending "land grant institutions" 
were required to take two years of ROTC. I planned to take Advanced 
ROTC. I barely passed the physical due to my hearing loss. I have 
*personal* knowledge that 'high frequency' components are important as I 
must use my "good ear" when expecting to understand female speakers.

If I recall my terminology [and spelling ;] correctly, consider 
"sibilants" and "fricatives" [possibly also "full stops"].


>
> On Wed, Jun 28, 2017 at 6:52 AM, Richard Owlett <rowlett at cloud85.net> wrote:
>
>> Up until about ten years ago, while still using Windows, I was following
>> voice recognition. At that time the only option was commercial product
>> which cost too much and wasn't a good match for my desires at that time.
>>
>> Time has passed and I'm retired. What I'm looking for would be a large
>> vocabulary, single speaker, continuous speech system. The application
>> would be straight text note taking - I'm a slow and lousy typist.
>>
>> I'm already investigating good microphones with good A/D resolution and
>> preferably high sample rate [I've ideas on pre-processing I would like
>> to experiment with].
>>
>> Can anyone recommend some survey articles &/or competent current reviews.
>> TIA