Vibration and low-frequency impact sound generated by normal human walking in lightweight wood-joisted floor-ceiling assemblies
Keywords:Floor ceilings, Human walking, Impact sound, Impact sound insulation, Low frequency, Lower frequencies, Noise levels, Pure tones, Sound pressure level, Spectrum range, Tapping machine
AbstractA study examining vibration and low-frequency impact sound generated by normal human walking in lightweight wood-joisted floor-ceiling assemblies is presented. The sound resembles a pure tone sound at the fundamental natural frequencies of wood floor-ceiling assemblies. The measured sound pressure levels (SPL) of the impact sound using an ISO tapping machine revealed that peak SPL occurred around those frequencies. Due to the limitation of the room height, the thickness of the topping was restricted to around 50 mm. This was another challenge in developing an effective remedy. Direct noise levels in the receiving room wire measured using a tapping machine located in the room above, according to ASTM E1007 method. In order to observe the transmission of the sound through the floor-ceiling assembly at lower frequencies, the spectrum range was extended between 0.8 Hz and 20 kHz. The effect of the topping mass on the impact sound insulation was clearly shown by comparison of third octave spectra measured in the receiving room.
How to Cite
Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i) to publish, reproduce, distribute, display and store the Contribution;
ii) to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii) to exploit all subsidiary rights in the Contribution,
iv) to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v) to licence any third party to do any or all of the above.