| ??? 06/22/06 04:07 Read: times |
#118827 - A test should tell it Responding to: ???'s previous message |
Hal said:
They use a relatively small number of calibrated tuning forks and tune the keys for which there is no fork by listening to the combined sound of the fork and the struck wire and counting the beat (intermodulation?). I can only assume that the same principals would apply throughout the audio spectrum. Yes, I think that's what I meant. Maybe Andy can discuss about this a bit, as he is an educated piano player? Whether this works even at very high audio frequencies (17kHz, or so) could easily be checked: Use two different audio amplifiers with two individual loudspeakers and output 17kHz by the one and 19kHz by the other. What can you hear now? (Take care, use rather small signals to not overload the tweeters...) I'm very curious whether this will work. If you can make such a test please report about the results! Hal said:
I just was wondering if the resulting 3 kHz tone would be loud enough. Depends on unlinearity of ear (if it works at all). Kai |
| Topic | Author | Date |
| High pitched ring tones | 01/01/70 00:00 | |
| LM556 | 01/01/70 00:00 | |
| Download The Ring Tone. | 01/01/70 00:00 | |
| Adding signals with two frequencies | 01/01/70 00:00 | |
| Sure? | 01/01/70 00:00 | |
| Yes, quite sure. | 01/01/70 00:00 | |
| Intermodulation not beat frequencies | 01/01/70 00:00 | |
| Remember piano tuners | 01/01/70 00:00 | |
| A test should tell it | 01/01/70 00:00 | |
| Tuning instruments. | 01/01/70 00:00 | |
| Yes, but... | 01/01/70 00:00 | |
| Mixing 2 ultrasonic frequencys | 01/01/70 00:00 | |
| Cool! | 01/01/70 00:00 | |
| We experimented with the "ionovac" | 01/01/70 00:00 | |
Mixing two rf signals | 01/01/70 00:00 | |
| Adding signals with two frequencies | 01/01/70 00:00 | |
| Don't do that! | 01/01/70 00:00 | |
| I'm with Andy | 01/01/70 00:00 | |
| active noise reduction | 01/01/70 00:00 | |
| Rest your fears | 01/01/70 00:00 | |
| a better idea | 01/01/70 00:00 | |
| Detecting high pitch sounds | 01/01/70 00:00 | |
| No, no, do it the hard way | 01/01/70 00:00 |