cmassey Posted January 4, 2012 Report Share Posted January 4, 2012 Ok, this is sorta in our realm. I want to build a tone generator for those freq. I can no longer hear. As a joke, and without being mean about it, I want to be able to take on set and just check those around me!!! I have a 8w amp already built, figure i drive my FOSTEX speaker and just see who responds!!! The things the mind comes up when bored... thanks....cleve Quote Link to comment Share on other sites More sharing options...
soundtrane Posted January 4, 2012 Report Share Posted January 4, 2012 be sure to check the director and producer Cleve! Quote Link to comment Share on other sites More sharing options...
cmassey Posted January 4, 2012 Author Report Share Posted January 4, 2012 My thought from the beginning!!! Quote Link to comment Share on other sites More sharing options...
Jay Rose Posted January 4, 2012 Report Share Posted January 4, 2012 Well, the young'uns probably hear it... even if that includes the producer and director. But if it doesn't have flashing lights, they won't pay any attention. Quote Link to comment Share on other sites More sharing options...
studiomprd Posted January 4, 2012 Report Share Posted January 4, 2012 There are several freq generator options I have the NTI Minirator Quote Link to comment Share on other sites More sharing options...
cmassey Posted January 4, 2012 Author Report Share Posted January 4, 2012 Now that a pretty cool generator....i was thinking more along the lines of a circuit with a basic 555 chip, a few parts and in the same box with my little amplifier! Keep it clandestine, and then turn on the flashing lights when someone starts to complain about headaches!!!! Quote Link to comment Share on other sites More sharing options...
Jay Rose Posted January 4, 2012 Report Share Posted January 4, 2012 Well, a 555 squarewave is going to leave you with tons of subharmonics in the dialog range. Maybe an RC instead? http://www.electroni...oscillator.html The other question is... does your portable speaker even have much response above 10 kHz? The ones I've tested have been pretty poor... The Real-World Case Against Small Speakers So far we’ve dealt with small speakers in the abstract. But once you get to real-world examples, the problem isn’t just lost highs and lows—it’s also what the speaker does to the middle. Good full-size monitor speakers are accurate over their entire range. Mixes you do on them will sound right on any other good monitor and will at least be predictable on most tiny monitors. But bad speakers are random; corrections that improve the sound on one may make it a lot worse on another. For example, there’s a small powered monitor that’s been popular for years. It looks professional, even has XLR connectors, and is often bundled with expensive dedicated nonlinear editors. It doesn’t sound professional. A speaker-designer friend of mine tested them with lab equipment, and I used what he discovered to retouch our frequency-analysis plot. The result is Figure 11.4. Waves’ PAZ will never look like this on your screen, but my version accurately depicts how these speakers distort the sound balance. The high and low ends disappear in the figure because they also do in the speaker. While the manufacturer claims a low-frequency limit of 80 Hz, things are very quiet down there. In reality, the bass starts to fall off drastically at 150 Hz and is essentially too soft to be useful by 100 Hz. The opposite happens to the highs: to reach a claimed 13 kHz cutoff, they apply a gigantic boost at 8 kHz; these speakers practically beg you to make the mid-highs too soft! To top it all off, there’s a major dip between 1 and 2 kHz—probably to make pop music sound better on them. Nobody could do an accurate mix with this kind of frequency response. Worse, all that equalization adds signifi cant distortion. A different multimedia speaker is often bundled with multi-processor towers, high-end video cards, and expensive NLE software. It consists of multiple 1-inch diameter speakers in a narrow stick, designed to sit on either side of your video monitors. This arrangement is even worse: along with the uneven response caused by equalization, the frequency response doesn’t even stay the same when you move your head. That’s because the length of the path from each individual tiny speaker to your ear will be different depending on head position, causing random cancellations and reinforcements (Chapter 1). -- yours truly, Producing Great Sound 3/e page 237 Quote Link to comment Share on other sites More sharing options...
soundchris Posted January 4, 2012 Report Share Posted January 4, 2012 Sine Sweep 20 Hz to 20 KHz 10 Seconds from freesound.org: http://www.freesound.org/people/reaktorplayer/sounds/94224/ Quote Link to comment Share on other sites More sharing options...
Chris R Posted January 4, 2012 Report Share Posted January 4, 2012 There are plenty of dog whistle app's for the iPhone that you can set the freq's. Quote Link to comment Share on other sites More sharing options...
Nikolozj Posted January 20, 2012 Report Share Posted January 20, 2012 Sound Forge Audio Studio 9.0 software allows you to generate frequencies from 0 to whatever sample rate your computer will have. My laptop's integrated crappy sound card can generate up to 11 000 khz. I usually use it to test speakers. always sounds spooky Quote Link to comment Share on other sites More sharing options...
Marc Wielage Posted January 21, 2012 Report Share Posted January 21, 2012 Oh, I think I know what speaker Jay is talking about... used in practically every edit bay known to man (that I've seen). Back to the generator idea: I use the one in my iPhone, SignalSuite, and hose that out to a speaker if I need to test something: This thing will generate damn near any thing -- sine waves, square waves, pink noise, white noise, sweeps, you name it. $9.99 on the app store. Quote Link to comment Share on other sites More sharing options...
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