Effect of classroom environmental quality on learning efficiency in summer

To explore the impact of classroom environmental quality on college students’ learning efficiency, this study conducts real-time monitoring of the classroom environment of a university in Xi’an in summer, and combines subjective questionnaires of 263 college students with learning efficiency tests to analyse the impact of six key environmental parameters: temperature, CO2concentration, wind speed, noise, illuminance and relative humidity on college students’ learning efficiency. The results show that temperature, CO2concentration, wind speed and noise have significant effects on learning efficiency. In a classroom environment with a temperature below 27.5 ℃, CO2volume fraction lower than 1 250×10-6, wind speed about 0.35 m/s, illuminance between 350 and 450 lx, and noise and relative humidity not exceeding 55 dB and 55%, respectively, participants demonstrate relatively better learning efficiency. There are significant differences in the impact of these environmental parameters on the four categories of learning efficiency factors, with temperature showing significant correlations with all four factors.