Silent Sound Function to recreate original patent

[Bdon303]

I was talking w Steve back in ver 1.2.x about a Silent Sound Function: https://forum.audacityteam.org/t/where-are-audio-files-stored/168/1

I’m curious if 1) If any changes/updates can be made for ver. 2.0.5

and 2) does this “Silent Sound Function” exactly recreate what the original patent produced? It is here: http://pdfpiw.uspto.gov/.piw?docid=05159703&PageNum=1&&IDKey=4AF74A0D116D&HomeUrl=http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1%2526Sect2=HITOFF%2526d=PALL%2526p=1%2526u=/netahtml/PTO/srchnum.htm%2526r=1%2526f=G%2526l=50%2526s1=5,159,703.PN.%2526OS=PN/5,159,703%2526RS=PN/5,159,703

with a diagram of the waveform as fig 2 (3rd page in) and it’s description in 3(a) on the last page.

Lastly, I’d like to output an external transduce that could handle the 14.5kHz carrier tone a bit better than my laptop speakers- any advice?

Thanks! I would have DM’ed Steve but I’m not allowed

[steve]

@Bdon303

I’m curious if 1) If any changes/updates can be made for ver. 2.0.5

I’m not sure what you’re asking. What do you want?

@Bdon303

2. does this “Silent Sound Function” exactly recreate what the original patent produced?

As in the previous topic:

@steve

The first code sample is modelled on Lowry’s method. He used two very high frequency oscillators (A and B) to create the “carrier wave”. The frequency of the carrier wave is the difference of A and B.

Lowry used oscillators made with valves, resistors, capacitors and stuff. The code that I pasted runs in software. I’ve not attempted to model the electronic circuits that he used. I’ve just applied the principles that he described.

@Bdon303

Lastly, I’d like to output an external transduce that could handle the 14.5kHz carrier tone a bit better than my laptop speakers- any advice?

Most headphones can handle 14.5 kHz.
You could also try using a “tweeter” from a hi-fi speaker (http://en.wikipedia.org/wiki/Tweeter). The cheapest tweeters to buy are “piezo tweeters”, but they tend to have a lot of distortion. “Dome” tweeters tend to be better.