Recent content by DonH56

I had trouble with the video, may try later. Perhaps try adding some mass (in the form of little dots/stickers/whatever of heavy'ish material) at different spots on each panel (front and back)? Lower and spread the fundamental panel resonance? Magnepan uses asymmetric "dots" (tie points) on a...

Most major electronic suppliers have sections on ESD control (Allied, Arrow, Digikey, Mouser, etc.) as well as lab material supply houses (don't have a list of them in mind). What works for your chair depends somewhat in its construction. Our lab chairs had a short metal chain dangling down from...

Got it, thanks. As for this: "Even if a real-world DAC would never actually construct any of those other waves, they are all valid solutions and it is only bandwidth filtering that narrows the set of possible solutions to just a single wave." And this: "My point has all along been from the...

OK, but to generate 32.1 kHz instead of 12 kHz, you'd need to either suppress (filter) the fundamental so only the image is present, or up sample using a scheme that also suppresses the fundamental. Both are do-able, using W-S or one of many other schemes, but AFAIK that is not what a...

https://techxplore.com/news/2024-04-world-largest-3d-printer-university.html

I am not sure you can correlate cause and effect for that case... Doesn't mean you are a bad person, but doesn't mean you are not... :)

Apart from internal processing to eliminate the baseband signal (as is done in some RF systems), how would an audio DAC generate the image without the fundamental? I admit I have not thought about this, just caught me off guard, curious. Does not fit my little pea brain's one-second grasp of the...

That is painful (literally); glad everyone is OK. It's been long enough that I don't remember what I had in mind at the time and am too lazy to wade back through the posts. I would certainly want to avoid sending HF energy through the tweeters, but in the real world conventional tweeters with...

I could be a millionaire if I just had less ethics and morals.

Most SPL meters have a short (sometimes long) shield around the mic that makes it more directional to limit the capture to a small'ish area (volume). Unlike many measurement mics, which typically have broad response (omni's are commonly used), an SPL meter is generally used to measure a specific...

^^^ Make sure the meter can read the audio band, or at least as high as you want to test. Many cheap meters, and even some expensive ones, target AC power lines and are limited to ~100 Hz or so.

Their refreshing approach to audiophile mythology is nice: https://nll.soundestlink.com/view/66295a80a1c51e5a2898f295/5cf925e815b61cc5a2a2ad0c?signature=fff21862a9f7f26e5702fa0339b4f90b2cfbf3a01aa7fe16aeede245aaef1ade

I'd be careful using the OSHA guidelines for music listening. If you read the actual OSHA docs, their levels are meant to retain the ability to converse as we get older, not to discern fine musical nuances and such over a wide range of dynamics and frequencies. They are very much an upper bound...

Poor objective measurements do not always equate to lack of listening preference, though studies by Toole et. al. show most of us prefer a more even response. Many folk have not heard a flat (anechoic) speaker with good off-axis response so have no basis for comparison. Peaks and valleys in the...

The viewpoint from Benchmark: https://nll.soundestlink.com/view/66295a80a1c51e5a2898f295/5cf925e815b61cc5a2a2ad0c?signature=fff21862a9f7f26e5702fa0339b4f90b2cfbf3a01aa7fe16aeede245aaef1ade