Toyomura, A., Fujii, T., Nakabayashi, K., Smith, D. R., Toyama, J., & Kawabata, Y. (2020). Speech levels: Do we talk at the same level as we wish others to and assume they do?. Acoustical Science and Technology, 41(6), 841-844. https://doi.org/10.1250/ast.41.841