https://www.kandagaigo.ac.jp/kuis/about/bulletin/en/026/pdf/012.pdf

http://ci.nii.ac.jp/els/110003814642.pdf?id=ART0005017018&type=pdf&lang=en&host=cinii&order_no=&ppv_type=0&lang_sw=&no=1460624289&cp=

https://www.teachingenglish.org.uk/article/english-sentence-stress

look up: English sentence stress, voice projection 

jazz chants (on youtube)

RQ: Will teaching voice projection help students obtain better sentence stress results?