One of the largest public sector entity of Government of India had constructed a large multipurpose hall in one of their staff colony in the year 1999. Multipurpose halls are basically used for recreation, indoor games and cultural functions with amplifying sound systems.

Couple of days prior to the inauguration of the hall, it was found that there was enhanced echo due to multiple sound reflections which highly impaired the clarity of speech. The chairman for the organization took the decision to rectify the flaw and ensure the hall’s efficient functioning.

Thermosonics Private Limited was invited to study the case and provide them with effective solution to fulfil all the requirements of the multipurpose hall as per building codes & standards.

A primary study revealed that multiple reflection of sound caused overlap of words, resulting in loss of clarity of speech. Thermosonics carried out RT 60 test of the hall to assess the reverberation time. To reduce reverberation time to acceptable level, a design was prepared using necessary acoustical material. The final report was simulated and submitted to the customer for their perusal.

Customer approved the design and placed the order to rectify this aberration. RT 60 was once again conducted post execution of work and found that it complied with the international standards of acoustic ambience of multipurpose hall. On completion of work, a letter of appreciation was sent by the customer accepting the solution as an effective one.