| ??? 06/23/06 18:51 Read: times Msg Score: +1 +1 Informative |
#118965 - I'm with Andy Responding to: ???'s previous message |
Anything that adds to the room SPL (sound pressure level) is a BAD way to go -- unless your intent is to cancel it out like active noise reduction. But here (hear) we are talking about making a loud, albeit inaudible, sound, audible.
It's like the old adage about how it's impossible to monitor something without affecting the something in a little way. The little the better. GB |
| 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 |