Actually it is fact. Amateur radio operators and radio to digital voice use a 2k wide bandwidth filter. IRLP project uses 8khz sampling.
On Jun 28, 2017 8:51 AM, "Richard Owlett" <[email protected]> wrote: > 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 <[email protected]> > 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 > > > > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
