Skip to main content

Tests with voice-detection

In an earlier post I presented a capsule-shaped gag. This shape offers a few (minor) advantages to the ubiquitous ball gag. Even though this capsule gag is only a stepwise improvement over the ball gag, long journey often starts with a few small steps.

A side effect of the lengthened shape of the gag is that it has sufficient space for a set of batteries and a blinking LED.

I like the blinking LED as a trick on its own, because it makes the gag appear more playful: less of a restraint, more of a fashion attribute. That said, the real reason I put a LED in a gag, is that I wanted to experiment with a voice detection circuit. The ultimate goal is to either block or discourage the person using his or her voice. The first step is detecting it, and that has now experimentally been implemented.

The half-ball of the gag unscrews, giving access to 2 AAA-batteries and a small circuit board.

The circuit has to MEMS microphones, one at each end, and a microcontroller. The microcontroller right now samples both microphones 10 times per second and dumps the results. I put the results of a short test in a graph, which is further down.

In the test, I had background music at roughly 65 dB and the moans I made were also roughly 65 db when measured at approximately 30 cm with a simple sound level meter. As is apparent, the ambient sound is barely picked up. The moans are very prominent: while it may be 65 dB at 30 cm, the sound level is much higher close to the source (meaning, inside the mouth). My hypotheses was that one would be able to to distiguish sound "coming from the outside" from sound coming from the voice, by comparing the levels of the front and back microphones. In the graph results, we see that this indeed works: on moaning the back microphone reports a higher sound level than the front microphone.

The first peak, at around 11.5 seconds, may be an error in capturing the microphone or in data transfer. The capturing software is still simplistic, it does not filter out outliers (or even check for them); and the microcontroller runs on its internal RC resonator, which isn't the best when doing RS232 communication.

The circuit does have a low-pass RC-filter with the cut-off frequency at 500 Hz. The idea is to filter out the "hiss" sounds of breathing. These sounds were indeed not an issue in my test. However, I haven't tested without these filters, so I don't know if breathing sounds are even an issue.

Now that we can detect a voice, how do we use that? Ah, there's the rub. I have currently no plan for the next step for this experiment. There is room in the capsule gag for a wireless module, but again: what do you do with it when receiving a signal from the gag. When moving toward the "voilette" gag design (as described in the mock patent), the next step would be the air valves, but I think that project is beyond my "hobby scope" budget.

Comments

Post a Comment

Popular posts from this blog

The Return of the Paramour - second edition

I have reworked the story to improve the plot line. The new story has ten chapters. The eight chapters of the first edition have been adjusted to snap into the new plot line. What is the story anyway? The Return of the Paramour is illustrated fiction, on young women ("paramours") who are obligated to regularly have sex with their patron. They do so in bondage, because the old medieval laws on seigneurial privileges and bondswomen are no longer in effect and modern (contract) law is not binding enough. The link (single PDF file for all 10 chapters) The Return of the Paramour (full)   Synopsis 1. The paradox of freedom In which the narrator is captivated by a new kind of erotic roleplay, and offers his assistance to an adult video producer that focuses on this roleplay. 2. The legacy of paramours In which the narrator learns that the kinky roleplay is inspired by the new bondage toys of an earlier group, and that this earlier group was in turn inspired by a naughty pra
2 comments
Read more

The Factory -- second edition

The Factory is an illustrated fictionnal story on bondage and sex. It is a follow-up to the story The Return of the Paramour . I initially published it in March 2021, and this is a revised version of the same story.   Download The Factory in PDF format. Warning : The story (still) contains depictions and descriptions of people drinking coffee. Why a second edition? After publishing the story, I received critiques on it, and those varied widely. However, many commenters remarked that the story had too much "world-building" and too little of the sexy stuff. In hindsight, I agree with that. That said, the story builds on the reasoning why there isn't anything wrong or immoral about sex slavery. The amount of world-building could not really be reduced by much, without breaking the story "logic". So instead, I expanded on the descriptions of the bondage. The story is now about a fifth longer. Another reason is that I was never happy with the ending, but at the time
Post a Comment
Read more

The functions of a gag

What a gag tries to achieve is one or more of the following: disable communication enforce silence mark the wearer as submissive disable the use of teeth to grab or handle objects punishment or humiliation The fourth function is often forgotten, but it is rather important. For example, someone who is bound with rope or tape and gagged with a simple cleave gag, may be able to open a drawer in the kitchen and pick up a knife from it with her mouth, then wedge it in somewhere and use it to cut through her ties. Functions #3 and #5 may go hand-in-hand. Some gags are specifically designed to be uncomfortable and unflattering. Other gags look rather nice though, but they do not hide their purpose of gagging a person. So my take is that you can have function #3 without function #5. The gag "invented" for the story The Return of the Paramour aims at functions #1 through #4, but specifically not #5. The ball insert (3) deep in the mouth keeps the tongue down and blocks in
Post a Comment
Read more