Acoustics, tuning & temperament
Relevant articles from Grove Dictionary (Oxford Music Online):
Acoustics: https://doi.org/10.1093/gmo/9781561592630.article.00134
In this general article different sections focus on instruments and voices
Hearing and psychoacoustics https://doi.org/10.1093/gmo/9781561592630.article.42531
Sound https://doi.org/10.1093/gmo/9781561592630.article.26289
Physics of music https://doi.org/10.1093/gmo/9781561592630.article.43400
Tuning https://doi.org/10.1093/gmo/9781561592630.article.28578
Temperaments https://doi.org/10.1093/gmo/9781561592630.article.27643
Mean tone temperament https://doi.org/10.1093/gmo/9781561592630.article.18222
Just Intonation https://doi.org/10.1093/gmo/9781561592630.article.14564
Pythagorean tuning https://doi.org/10.1093/gmo/9781561592630.article.22604