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Monday, July 8 • 16:50 - 17:10
FROM MEASUREMENTS, THROUGH COMPUTER MODELLING, DESIGN AND CONSTRUCTION, BACK TO MEASUREMENTS: ACOUSTICAL MODERNIZATION OF 800 PUPILS PRIMARY SCHOOL IN WARSAW, POLAND

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This paper discusses the design, realisation and acoustical performance of the newly modernised (2018) primary school (classes' I-VI) located in Warsaw, Poland. Four types of rooms are discussed: classrooms, corridors, canteen and a sports hall. Pre-modernisation acoustical measurements showed long reverberation times, high sound pressure levels and low speech intelligibility in all rooms, which confirmed complains from teachers, parents and pupils and resulted in a decision to retrofit sound absorbing elements in all rooms just 5 years after the school was commissioned (2012). Due to restrictions in possible reduction of classrooms height and area of retrofitted materials, acoustical and architectural designs were focused on minimising the thickness and required area of newly installed sound absorbing materials, while still achieving the required reverberation time (RT ≤ 0,6 s.) and Speech Transmission Index (STI ≥ 0,6). Use of measurements for proper calibration of computer models are described, followed by the acoustical performance and subjective evaluation of the finished rooms. Aspects deserving special mentioning were: the possible use of materials only on walls in sports hall; negative effect of parallel smooth painted walls in acoustically damped corridors causing flutter echoes; the effect of low thickness of sound absorbing material on it's performance in low frequencies; construction details of interior materials and technical installations.

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avatar for Lily Wang

Lily Wang

Professor and Associate Dean, University of Nebraska - Lincoln

Authors

Monday July 8, 2019 16:50 - 17:10 EDT
St-Laurent 4
  T11 Room & build. acoustics, SS02 Classroom acoustics