Further Investigations of Partitions Having Built-in Acoustic Treatment

Laboratory measurements were made of the sound insulations and absorption coefficients of a range of metal-framed partitions having built-in acoustic treatment. The partitions were made using glass wool and gypsum boards. The sound insulations of the single leaf partitions having built-in acoustic treatment were considerably lower than those of comparable partitions made using mineral wool, gypsum boards and fibreboard. For the double leaf partition having built-in acoustic treatment, the sound insulations were, on average, 8 dB higher than those of the comparable partitions containing mineral wool. The use of the new double and triple leaf partitions containing built-in acoustic treatment should result in similar savings of floor areas to those obtained by using the partitions containing mineral wool as built-in acoustic treatment. However, it should be possible to obtain a flatter reverberation time curve using the new partitions and the sound insulations should be higher, provided that double leaf partitions are used.