I recently fell over a page in “An introduction to the psychology of hearing” by Brian C J Moore “In fact, since 1972 sound levels have tended to increase, as amplifiers have become more powerful and loudspeakers more efficient. Nowadays …
In danish building regulation, there is a specific requirement for the sound insulation of the door connecting a stairwell/hallway and a Living room.Often times danish acoustic consultants will refer to the sound insulation classification of the door when defining the …
You have probably heard of ‘Sound Pressure Level’. Often related to what your ears can hear and is most often quantified in decibels. Perhaps you also know that it can be A-weighted to our own hearing? So far so good, …
Does it matter where we place the absorption material in a suspended sound absorption ceiling? In short: Yes In not so short: Say we have a suspended wood wool board ceiling, and we want to utilize the acoustic ceiling for …
Where to place the mineral wool in cavity for a sound absorption ceiling? Read more »
We can run into Orthotropic plates, and unlike Isotropic plates, Orthotropic plates will have different characteristics in different directions. An example of an Orthotropic plate is wood, that have a vastly different bending stiffness parallel with the fibres if compared …
Acoustic flanking transmission refers to the indirect path through which sound travels between different spaces or structures, bypassing conventional soundproofing measures. Understanding flanking transmission is important for effective acoustic design and noise control in buildings and other structures. Flanking transmission …
Is Acoustic Ceiling with Diffuse ventilation GOOD or BAD? Diffuse ceiling ventilation uses the open space between the ceiling slab and a suspended ceiling as a ‘plenum’ (fancy word for ‘air-storage’) to push fresh air through the porous suspended ceiling, …
You can get quite a bit of information out of a room by simply snapping your fingers or clapping your hands.Theoretically you can excite all sound wavelengths (keyword here is: theoretically ) and listen to the whole impulse response of …
Will a resilient channel bar help with improving the Sound Reduction of a partition? While a resilient material for breaking up resonances and dampening vibrations, is a good idea, it usually comes with a bit more planning than usual. A …
Resilient Channel Bar for Sound Reduction – Good or Bad? Read more »
The weighted sound reduction index is derived with the help from a standardized curve In the frequency range 100 – 3150 Hz. The reference curve comes from the International Standard 717-1. The reference curve is shifted up or Down on …
