Saving the Teacher's Voice: Amplification Priced Against Vocal Dose

Teaching in noise is an occupational load on the voice. Using a stated energy proxy for vocal dose, this paper compares a day spent at raised voice with a day at normal voice assisted by a small personal amplifier, and prices the amplifier and its battery. The dose reduction is large because dose grows with the square of amplitude. Voice failure is treated here as an equipment problem with a computed price, not as a personal failing of teachers. Computed results: daily_dose_raised_arbitrary = 20.0, daily_dose_normal = 5.0, dose_reduction_with_amp_pct = 75.0, amp_cost_usd = 38.0, amp_battery_Wh_per_day = 15.0. Every number in this paper is produced by the accompanying script `compute.py`. SIMULATED, NOT MEASURED.