3958 Hz?

[Dusty Chalk]

I saw this on a license plate:  "3958 HZ", and since it's within the audible spectrum, I thought I'd ask here.  Anyone know the significance?

[mikeymad]

um....

 

 

 

 

 

 

 

[Torpedo]

It could be the frequency of his tinnitus. Noise induced hearing loss frequently shows a notch around 4KHz in the audiogram, and it's usually associated to tinnitus.

I've checked and it's not exactly any note in the western "well tempered" tuning system (using 440Hz A as the reference), not so sure if you used a 432Hz A as suggested here: http://onlinetonegenerator.com/432Hz.html. However it's close enough to the seventh octave B (3,956.06Hz) and within its tuning range to think that it could be some sort of personal joke. It'd be helpful knowing if he's a musician. Maybe is a physicist and this is the resonant frequency of something he's working on.

I've also found that android phones have some issue digitizing audio up to 3958Hz https://www.dsprelated.com/showthread/comp.dsp/335371-1.php

[Dusty Chalk]

Oh, interesting, hadn't of that latter.

Thought of ham radio, but that would be missing a 'M' or at least a 'k'.  

Might it be the lowest frequency for a carrier frequency for voice quality? 

Maybe this is his favourite frequency region to cut or boost?

Not sure what any of those have to do with Hz, Mikey, but thanks for the larph.

[Torpedo]

There're RF emissions in that low frequency too, but AFAIK they're used by submarines and other military purposes. Funnily enough some recordings made in France, at some place I can't recall now which is next to a submarine base, show a low frequency imprint for the recording system tuning that carrier and converting it into sound in the mix.

IMO it's more likely related to the Android smartphones issue, the exact frequency at which the problem starts seems to be 3958Hz. I quote from that thread:

Quote

When a tone generator is below about 3700 Hz, the spectrum displayed
on the phone shows just one peak at the desired frequency.  As the
frequency of the tone increases toward 4000 Hz, a very tiny mirror
image peak begins to appear on the other side of 4000 Hz.  It
gradually gains in amplitude until by 3958 Hz, the amplitude of the
image peak is actually higher than the correct peak.  As the tone goes
above 4000 Hz, the image peak appears below 4000 Hz, and gradually
decreases in amplitude as the tone frequency increases.  I ran the
tone frequency up to 4698 Hz and saw a single peak at 4698 Hz in the
spectrum and no image peak.  This entirely destroys my supposition
that this phone is initially sampling at 8000 Hz and then up-sampling
to 44100, because if it were, there would be no way to show a single
peak at 4698 Hz with no image peak, right?  I mean, the information
that discriminates between 4698 and 3302 is totally destroyed if the
audio is initially sampled at 8000 Hz.