[IN NO PARTICULAR ORDER]
https://www.physicsclassroom.com/mmedia/waves/gsl.cfm
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Notes/AQA/03-Waves/Detailed%20Notes%20-%20Section%2003%20Waves%20-%20AQA%20Physics%20A-level.pdf
https://jeromeleary.com/laser/
https://www.sweetwater.com/insync/flatwound-vs-roundwound-bass-strings/
https://www.sweetwater.com/sweetcare/articles/how-to-change-strings-on-a-bass/
https://www.recycleaid.co.uk/wood-and-timber/wood-and-timber-recyling/
https://www.nde-ed.org/Physics/Sound/acousticimpedance.xhtml
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/958486/MRI_guidance_2021-4-03c.pdf
https://www.classicfm.com/discover-music/latest/perfect-acoustic-concert-hall-science/
https://www.yamaha.com/en/musical_instrument_guide/acoustic_guitar/mechanism/#:~:text=Guitars%20consist%20of%20two%20sections,the%20top%20of%20the%20guitar.
https://www.studybass.com/gear/bass-guitar-buying-guide/tone-woods/#:~:text=Softer%20woods%20have%20a%20mellower,in%20some%20bass%20guitar%20bodies
Moragne, W. (2011). Depression. United States: Lerner Publishing Group.
PHD Bass Guitars Introduces Ergonomic Lightweight Bass (ELB)
https://www.sweetwater.com/insync/how-do-guitar-pickups-work/#:~:text=At%20its%20most%20basic%2C%20a,mechanical%20energy%20as%20sound%20waves.
https://technicalfoamservices.co.uk/blog/what-is-a-product-design-specification-pds/
NHS (2021) Research involving children, Health Research Authority. NHS. Available at: https://www.hra.nhs.uk/planning-and-improving-research/policies-standards-legislation/research-involving-children/.
https://kerrlaloush.home.blog/2020/08/30/mathematics-of-guitar/
https://www.stringsdirect.co.uk/blog/how-to-measure-bass-scale-length/