ringmod air test 1 inside RFI

Experimental high frequency acoustic modulated 16khz single sideband (lower) sideband sound transmission through air, (similar to what an underwater acoustic telephone does), mix of 262239__wjoojoo__earth05 (left) 262676__shadowisp__haiku (mono) and 263544__speedenza__haiku-1-voice (right). These 3 sounds were looped, mixed, then modulated using Goldwave's mechanize effect combined with low pass filters to get rid of the upper sideband. Recorded in 2022, the modulated voices were coming through my computer speakers bought in 2003 and my HP desktop pc. I used my Iphone SE2020 with Zoom IQ7 stereo microphone with the Voice Memos app to record the sound coming from the speakers as I walked all over the 3 bedroom apartment. I then opened that file in Goldwave and used mechanize to demodulate again. The watery effect is caused somewhat by slight Doppler effect, but mostly by the fact that the peaks and valleys of interference patterns at those frequencies (and shorter wavelengths) are much closer together. This is why a mobile analog vhf radio hears fluttering that increases in speed as the vehicle increases speed. A cb radio at longer wavelengths will hear much slower flutter heard as slow in and out fading as you drive down the highway. Reflections from objects alternately reenforce and subtract from the amplitude of the received signal. You can notice this effect by playing a high pitched sound into a room and moving your head around. The sound will fade in and out. Some time stamps so you know what the modulated normal sounds of the room and phone were. Until about 1:35 RFI can be heard from the phone's cellular radio doing something. Of course it is modulated because demodulating the ssb sound also modulates any normal sound that was picked up. At 00:17 a modulated tv begins to be heard playing commercials as I come out of my room where the computer is to walk through the apartment. This is the demodulated version of my sound so the tv commercials sound like just scratching and swishing. At 00:34 there is a microphone bump. at 00:43 I breathe somewhat loudly. At 00:57 another microphone series of thumping. It's plugged directly into the phone and hard to hold in place as I walk. at 1:09 the floor creaks, after which I walk past a running fan, but it isn't that loud. The fan appears as a high frequency hiss. At 1:34 the rfi slows down and stops and the tv gets louder. At 1:46 I have a short conversation with my mom that ends at 1:51, after which the tv peaks. At 2:07 a little RFI click. 2:15 another click. 2:29 mic noise. 2:31 passing another fan as I go into the room at the opposite end of the apartment from my room. This fan is louder. 2:43 another mic bump. 2:51 mic rubbing maneuvering. 3:08 mic bump. I come out of the far room and you hear the tv again. 3:12 mono loop female voice finishes. 3:13 mic bump. tv peaks a second later. 3:44 right loop British male voice finishes. The voice on the left speaker is the only one left. 3:55 tv fades as I go into the kitchen next to my room. 4:26 I come out of the kitchen and make my way back to my room. 4:38 in the undemodulated recording I begin to hear the zzt zzt sst of the modulated voice. 4:45 something squeaks as I go to sit down at the computer. 4:53 mic bumps. 4:54 loud mic noise as I prepare to stop recording.