Question

Which of the following constructions is effective against both air-borne and structure-borne sounds?

(a) Timber floor floating construction

(b) Use of resilient surface material

(c) Timber floor with suspended ceiling and air space

(d) Concrete floor floating construction

I have been asked this question during an interview for a job.

This is a very interesting question from Acoustics topic in chapter Acoustics and Ventilation of Construction & Building Materials

Answer 1

Right option is (c) Timber floor with suspended ceiling and air space

For explanation: Timber floor with suspended ceiling and air space construction is effective against both air-borne and structure-borne sounds. The extent of improvement effected is dependent on the weight of the ceiling and on the structural rigidity.