IsoCal App

Update 1.4.5 is live on app store! The update includes several fixes and an overhauled results page showcasing more detail and is now fitted with a 'copy data' button. 🙌 See the video below. 👇 If you want to check out IsoCal App for yourself, you can find it on the App Store. 👍 Thanks for following along the development. #Acoustics #BuildingAcoustics #NoiseControl #Noise #Engineering #IsoCalApp

A short development update for IsoCal App. 🙌 - The coming update will include more elastic line connections (studs with resilient channel bars). The elastic connections are found under Cavity settings in the Double Wall calculation module, see the video below for a demonstration. - Furthermore, the update will fix issues with calculating the diffuse absorption coefficient. The update also adds the auto-scaling for thick wall constructions. - Lastly, some changes in the material properties has been done to get better estimation calculation of the sound reduction for certain materials. Thank you for following along the development for IsoCal App and stay tuned for more updates. ⬆️ #Acoustics #IsoCalApp #SoundReduction #AbsorptionCoefficient #Noise #NoiseControl #BuildingAcoustics #RoomAcoustics

A quick reminder regarding the decay time - Room Acoustics ❗ 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: theoretically 😉 ) and listen to the whole impulse response of the room only limited by your own hearing. 👂 Imagine the sketch below, a speaker (source) in one end and a listener (receiver) in another end of the room. Initially, in the receiver end, you'll hear the "Direct" sound. Afterwards, you'll hear the "Early" reflections, and later the "Late" reflections. This is also the foundation of how we measure the reverberation time in a room. 🙌 You'll quickly see (and hear) how the reverberation time can be an important factor when designing for good acoustics indoors, as you don't want the sound to 'smear' into itself and leave a long tail of noise. In many cases the reverberation time can directly correspond to the speech intelligibility. #Acoustics #RoomAcoustics #BuildingAcoustics #DecayTime #SoundAbsorption #SoundReflection #ReverberationTime

Resilient channel bar for improving sound reduction? 🤔 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 (as sketched underneath) is a 'spring-like' and usually profiled metal bar that will allow the fastened plate (in this case a plasterboard) to hopefully dampen the transmitted sound through the partition. The keyword is 'Hopefully'. Why am I not being specific here? Will it make it better or not? 💢 There is a reason I am not being specific, as the dynamic properties of such a resilient channel bar is not standardized and comes in wildly different and sometimes outright wrong shapes/sizes. In the end, the 'resilient' can just be a sales tactic with no test to back the dynamic properties of the product. While a resilient channel bar can indeed improve the sound reduction of a partition, it is up to you to make sure that the dynamic properties of the channel bar is comparable and similar to those showcased in studies regarding resilient channel bars for sound reduction. #Acoustics #SoundReduction #NoiseControl #Noise #BuildingAcoustics #ResilientChannelBar

Sound Absorption, Reflection and Scattering - All 3 are important when discussing room acoustics. 🙌 Room Acoustics can be a balancing act, so do not weigh one higher than the other without determining the consequences. ⚖️ Sound Absorption: Sound absorption involves the process of reducing the reflection of sound waves from surfaces. Materials with high sound absorption coefficients are effective in minimizing the amount of sound energy reflected back into the room. Reflection: Reflection occurs when sound waves encounter a surface and bounce off it, potentially reaching our ears as echoes, reverberation or standing waves. The nature of the surface affects the behavior of the reflected sound. Smooth, hard surfaces like glass or concrete tend to reflect sound more efficiently. Scattering: Scattering refers to the random redirection of sound waves when they encounter irregular surfaces or objects. Unlike a 'clean' reflection, where sound waves bounce off a surface at a specific angle, scattering causes sound to disperse in various directions. This phenomenon helps to break up focused sound reflections and can contribute to a more diffuse sound field. #Acoustics #NoiseControl #BuildingAcoustics #RoomAcoustics #Noise #SoundAbsorption

Glass Rooms (meeting rooms), hard glass surfaces, a 'minimal' and 'raw' look may be what is creating the harsh reality for a lot of employees around the world. 🙌 As nice and open as a glass room can look, as difficult it can be to get the right acoustics. Opposing hard glass surfaces creates a perfect setting for standing sound waves and long reverberation times. Combine this with a minimal design (usually meaning very little and hard furniture), and you have a recipe for an acoustic mistake. ❗ All is not lost though, as glass rooms can be done quite well acoustically by choosing the right ceiling, placing plenty of acoustic diffusers (like furniture) and making sure that big opposing surfaces aren't all glass and completely flat to reduce standing waves. #Acoustics #NoiseControl #RoomAcoustics #BuildingAcoustics #ReverberationTime

A danish study from Roskilde University (RUC) regarding traffic noise and fertility. 👶 One important part is below (see further down for english translation) DANISH (original): "Studiet viser også, at vejstøj kan have en negativ effekt på fertiliteten hos kvinder over 35 år. Risikoen for infertilitet hos denne gruppe stiger med 13 pct. for hver gang vejstøjen stiger med 10 decibel. Forskerne antager, at vejstøj kan føre til øget stress og forringet søvn, hvilket kan påvirke kvinders evne til at blive gravide. For kvinder under 35 år fandt forskerne ingen klar sammenhæng. Forskernes resultater tyder også på, at vejstøj muligvis kan påvirke fertiliteten hos mænd, men her er resultaterne ikke så entydige som for kvinder." ENGLISH (translated): "The study also shows that road noise can have a negative effect on the fertility of women over 35. The risk of infertility in this group increases by 13 per cent. for every 10 decibel increase in road noise. The researchers hypothesize that road noise can lead to increased stress and impaired sleep, which can affect women's ability to conceive. For women under the age of 35, the researchers found no clear correlation. The researchers' results also suggest that road noise may affect fertility in men, but here the results are not as clear as for women." credits to the study below, original link from RUC https://lnkd.in/dUiT9Bpc #NoisePollution #NoiseControl #TrafficNoise #Noise #Health #Fertility

Sneak peak and development Update for IsoCal.🤫 This time it is a change that has been in the crosshair for a while - An overhauled results page for all Three calculation modules! The user can now also copy the data to clipboard for single Wall and double Wall Sound reduction calculations. See the video below for a preview of some of the changes.👇 Thanks for following along the development Update 😁

In case you missed a few posts here on LinkedIn, they are usually summarized on the website below. 👇 There is some good information on there, so check it out if you're interested to know more about the world of acoustics 🙌 https://lnkd.in/epcHrSzW #Acoustics #IsoCalApp #BuildingAcoustics #NoiseControl #Noise #SoundAbsorption #SoundInsulation #SoundReductionIndex

Consider a space where 2 open rooms are separated by a wall, however there is an indirect path to each room through the openings on the same side. See below for a sketch. 👇 To expand on the example, would be like having two open plan offices next each other separated by a wall with open passage, or a printing room/area next to an open office. While an obvious improvement to the sound transmission, would be to close off each room with a door or something similar, however it may not be the desired function of the rooms. 🤔 As an acoustics consultant, one may be challenged with similar cases like this, and finding a solution can't always be the obvious choice. If the two rooms has to be open for one reason or another, one way to try and reduce sound transmission from one open room to another, could be to locate flanking sound transmission paths and try to reduce reflections with absorption material. 🙌 It should be noted that the effect of sound absorption material may not be enough to reduce the total noise to a desired level. #Acoustics #NoiseControl #BuildingAcoustics #RoomAcoustics #Noise #OfficeNoise