Sound Particles Density free instal2/13/2024 The red dots indicate my mom’s viewing position and my dad’s head while he is trying to sleep. My parents understand that acoustic diffusion is not an exact science, and they appreciate my honesty.ĭistribution of the sound pressure level (dB) without a door between the rooms. If you decide on a similar time-saving measure, I suggest that you be open about it. To compensate for the lack of carpets and the relatively sparse decoration, I then nudged the wall coefficient slightly in the upward direction. I selected a constant low value for the walls (including the floor and the ceiling) and a higher one for the soft parts of the furniture. If you want to be more thorough, you can use different values in different frequency bands, or even specify them as arbitrary functions of the frequency. This was a breeze - two power sources representing the stereo speakers connected to the television, absorption coefficients assigned to the walls and the furniture, and…that was it.Īpproximate absorption coefficients for common materials are easy to find online. With the drawing complete, I set out to create my first acoustic diffusion model. This interface is very easy to use and, in most situations, it is a lot faster than the more accurate Pressure Acoustics or Ray Acoustics interfaces.įor my simulation, I created a simple drawing of the relevant rooms and included the larger pieces of furniture. The obvious start for a “quick and dirty” model of the acoustics in an apartment is the Acoustic Diffusion Equation interface. Acoustic Diffusion in COMSOL Multiphysics I just needed to establish that my dad would get his beauty sleep. Luckily, accuracy was not a primary concern. In short, they are bound to mess around with the input data and thereby remove digit after digit from the precision of any a priori sound level estimate. My dad is constantly moving furniture around to, as he says, “feel the space.” My mom, meanwhile, tends to pull the couch closer and closer to the television rather than admitting that she needs glasses. As they will eventually need to downsize, I decided to help them plan a home where they could stay friends.įrom past experience, I knew there was no sense in trying to optimize the location of every plant, rug, or bookcase. My mom enjoys watching late-night television talk shows, while my dad prefers a good night’s sleep whenever he gets the chance. My parents love each other to death, but their habits can sometimes clash. I will introduce the topic of acoustic diffusion by sharing my own personal experience, while highlighting the assumptions behind this modeling approach, as well as its strengths and weaknesses. In fact, this method of acoustical analysis proved particularly helpful in planning the layout of my parents’ future home. The acoustic diffusion equation is the quickest and easiest way to model high-frequency acoustics.
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