Use Dialog to Calibrate Loudness

In the 115th AES Convention paper "Intelligent Program Loudness Measurement and Control: What Satisfies Listeners?" 19 of 21 listeners agreed with each other to within 1dB when evaluating the subjective loudness of speech. However, they disagreed when asked what constitutes "appropriate" loudness for footsteps. Also in the paper, TV listeners preferred dialog at 60.5 dB SPL versus 69 dB in home theaters. Normal conversational speech fall in the range of 55 to 66 dB SPL. All SPL is measured at A-weighted, slow.