So a couple of days ago 432 verses 440 hertz was a topic and I became interested. There is a lot about 432 but not much about 440. I will drop the links to interesting pages:
432 hertz
https://www.google.com/search?biw=1519&bih=1264&ei=8KmfXoeGJoKqtQa4_pioAQ&q=432+hertz&oq=432+hertz&gs_lcp=CgZwc3ktYWIQAzIICAAQgwEQkQIyAggAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADICCAA6BAgAEEc6BAgAEEM6BQgAEJECOgUIABCDAToHCAAQgwEQQ1D9swZYvtIGYJzVBmgAcAF4AIABS4gBqgSSAQE5mAEAoAEBqgEHZ3dzLXdpeg&sclient=psy-ab&ved=0ahUKEwiHvs-2_ProAhUCVc0KHTg_BhU4ChDh1QMIDA&uact=5
https://www.gematrix.org/?word=432
http://www.davidjayjordan.com/432KeyofStarofDavid.html
http://www.greatdreams.com/432.htm
https://www.healingfrequenciesmusic.com/musical-harmonics-and-hebrew-gematria/
https://www.facebook.com/awakets/posts/432hz-the-truth-about-a-numberso-today-someone-peaked-my-interest-about-the-impo/345243059166490/
https://www.mindvibrations.com/432-hz/
https://attunedvibrations.com/432hz/
https://ask.audio/articles/music-theory-432-hz-tuning-separating-fact-from-fiction
https://www.izotope.com/en/learn/tuning-standards-explained.html
https://www.google.com/search?biw=1519&bih=1264&q=432+hertz&tbm=isch&source=univ&sa=X&ved=2ahUKEwiC-vbq_ProAhUEa80KHb16CLEQsAR6BAgFEAE images432.
440 hertz:
https://www.google.com/search?q=440+hertz&ei=kqyfXoi7BtG4tQb91qX4Cg&start=10&sa=N&ved=2ahUKEwiIzOH3_vroAhVRXM0KHX1rCa8Q8NMDegQIERA-&biw=1519&bih=1264
https://www.wam.hr/sadrzaj/us/Cavanagh_440Hz.pdf
https://www.google.com/search?biw=1519&bih=1264&q=is+440+hz+dangerous&sa=X&ved=2ahUKEwjynuXr__roAhUNOs0KHa42DT44ChDVAigAegQICxAB
https://www.gematrix.org/?word=(440
https://www.google.com/search?q=visual+of+440+hertz&tbm=isch&source=univ&sa=X&ved=2ahUKEwimovnlgPvoAhUbAp0JHbdpAzoQsAR6BAgEEAE&biw=1519&bih=1264 440hertz images.
Interactive wave simulators:
https://www.google.com/search?ei=yK6fXqyPHoqxtQbp7qLYCQ&q=interactive+wave+simulator&oq=interactive+wave&gs_lcp=CgZwc3ktYWIQARgAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADIFCAAQzQI6BAgAEEc6BQghEKABOgUIIRCrAjoGCAAQFhAeOggIABAWEAoQHjoFCAAQkQI6BQgAEIMBUOxVWKrBAWD0_wFoAHADeACAAVSIAZYFkgECMTGYAQCgAQGqAQdnd3Mtd2l6&sclient=psy-ab
https://www.physicsclassroom.com/Physics-Interactives/Waves-and-Sound/Simple-Wave-Simulator/Simple-Wave-Simulator-Interactive
https://www.pbslearningmedia.org/resource/arct15-sci-standingwave/standing-wave-simulator/
https://academo.org/demos/wave-interference-beat-frequency/
432 hertz
https://www.google.com/search?biw=1519&bih=1264&ei=8KmfXoeGJoKqtQa4_pioAQ&q=432+hertz&oq=432+hertz&gs_lcp=CgZwc3ktYWIQAzIICAAQgwEQkQIyAggAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADICCAA6BAgAEEc6BAgAEEM6BQgAEJECOgUIABCDAToHCAAQgwEQQ1D9swZYvtIGYJzVBmgAcAF4AIABS4gBqgSSAQE5mAEAoAEBqgEHZ3dzLXdpeg&sclient=psy-ab&ved=0ahUKEwiHvs-2_ProAhUCVc0KHTg_BhU4ChDh1QMIDA&uact=5
https://www.gematrix.org/?word=432
http://www.davidjayjordan.com/432KeyofStarofDavid.html
http://www.greatdreams.com/432.htm
https://www.healingfrequenciesmusic.com/musical-harmonics-and-hebrew-gematria/
https://www.facebook.com/awakets/posts/432hz-the-truth-about-a-numberso-today-someone-peaked-my-interest-about-the-impo/345243059166490/
https://www.mindvibrations.com/432-hz/
https://attunedvibrations.com/432hz/
https://ask.audio/articles/music-theory-432-hz-tuning-separating-fact-from-fiction
https://www.izotope.com/en/learn/tuning-standards-explained.html
https://www.google.com/search?biw=1519&bih=1264&q=432+hertz&tbm=isch&source=univ&sa=X&ved=2ahUKEwiC-vbq_ProAhUEa80KHb16CLEQsAR6BAgFEAE images432.
440 hertz:
https://www.google.com/search?q=440+hertz&ei=kqyfXoi7BtG4tQb91qX4Cg&start=10&sa=N&ved=2ahUKEwiIzOH3_vroAhVRXM0KHX1rCa8Q8NMDegQIERA-&biw=1519&bih=1264
https://www.wam.hr/sadrzaj/us/Cavanagh_440Hz.pdf
https://www.google.com/search?biw=1519&bih=1264&q=is+440+hz+dangerous&sa=X&ved=2ahUKEwjynuXr__roAhUNOs0KHa42DT44ChDVAigAegQICxAB
https://www.gematrix.org/?word=(440
https://www.google.com/search?q=visual+of+440+hertz&tbm=isch&source=univ&sa=X&ved=2ahUKEwimovnlgPvoAhUbAp0JHbdpAzoQsAR6BAgEEAE&biw=1519&bih=1264 440hertz images.
Interactive wave simulators:
https://www.google.com/search?ei=yK6fXqyPHoqxtQbp7qLYCQ&q=interactive+wave+simulator&oq=interactive+wave&gs_lcp=CgZwc3ktYWIQARgAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADIFCAAQzQI6BAgAEEc6BQghEKABOgUIIRCrAjoGCAAQFhAeOggIABAWEAoQHjoFCAAQkQI6BQgAEIMBUOxVWKrBAWD0_wFoAHADeACAAVSIAZYFkgECMTGYAQCgAQGqAQdnd3Mtd2l6&sclient=psy-ab
https://www.physicsclassroom.com/Physics-Interactives/Waves-and-Sound/Simple-Wave-Simulator/Simple-Wave-Simulator-Interactive
https://www.pbslearningmedia.org/resource/arct15-sci-standingwave/standing-wave-simulator/
https://academo.org/demos/wave-interference-beat-frequency/