Great places on the web related to sound

General Sound

Comparing Light and Sound

Freebar Calculator http://scimuze.com/Museum/free_bar_instrument_instructions.htm

Physics of Sound in Music https://method-behind-the-music.com/mechanics/physics/

The Nature of sound https://physics.info/sound/

Sound Physics https://homepages.wmich.edu/~hillenbr/206/ac.pdf

Understanding Harmonics https://www.teachmeaudio.com/recording/sound-reproduction/fundamental-harmonic-frequencies/

Physic of Music from MTU http://www.phy.mtu.edu/~suits/Physicsofmusic.html

Alternate Temperaments: Theory and Philosophy by Terry Blackburn http://www.terryblackburn.us/music/temperament/index.html

Musical Instruments of the World http://www.allthemusicalinstrumentsoftheworld.com/index.php?page=Moredetailsaboutinstruments

PVC Whistle/Flute https://www.flutopedia.com/refs/Gonzato_2015_LowTechWhistle.pdf

Experimental Musical Instruments http://barthopkin.com/instrumentarium/

The Odd Music Gallery http://www.oddmusic.com/gallery/

More Experimental and odd instruments http://www.tidewater.net/~xylojim/Artsy.html

Making musical instruments - Bart Hopkins Musical Instumnents - pdf

Historical

• Acoustic Radar & Sound Location http://www.douglas-self.com/MUSEUM/COMMS/ear/ear.htm
• Voice Pipes and Speaking Tubes http://www.douglas-self.com/MUSEUM/COMMS/voicepipe/voicepipe.htm

Exploring Hearing - Kindergarden https://www.brighthubeducation.com/pre-k-and-k-lesson-plans/127801-exploring-our-sense-of-hearing/

Sound Vibrations - PBS Learning https://www.pbslearningmedia.org/resource/phy03.sci.phys.howmove.lp_sound/sound-vibrations/

Investigating Sound and Hearing https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/science/continuum/Pages/soundlearn.aspx

Seeing Sound - NASA https://www.hq.nasa.gov/office/aero/pdf/seeing_sound_k-8.pdf

Seeing Sound Educator Guide - NASA https://www.nasa.gov/sites/default/files/atoms/files/chevrons-educator-guide-v5.pdf

List of Sound Related Materials froom NASA https://nasasearch.nasa.gov/search?query=sound&affiliate=nasa&utf8=%E2%9C%93