Post by timc on Sept 22, 2022 14:08:58 GMT
Hi everyone!
First of all I'd like to thank all the contributors to this forum and Ethan, I've learnt so much from everything you share.
I recently moved out of a rental apartment and into my own place. Fortunately my wife let me dedicate one bedroom to listening to music (and accomodating her parents when they visit). I'd like to DIY corner bass traps and would really appreciate constructive feedback on my plans layed out below.
I've measured the room at the listening position and below is the frequency response. I've a peak at 45Hz and theoretically, the ideal bass trap for me would be 1.9m/ 75" deep (this is equal to 1/4 the wavelength of 45Hz which is 7.64m/ 301"). This is not feasible.
.
The next best alternative I can think of is to build a quarter circle cross section soffit bass trap that has a 50cm/ 19.6" radius, which is a little over 1/16th the wavelength of 45Hz. I do not have space for an ideal square cross section soffit and I predict that a quarter circle would be better than a triangular cross section because no matter the angle of incidence of the soundwave, it would pass through 50cm of porous material before hitting the wall. Based on the acousticmodelling.com calculator, it would perform better if I fill it only with R30 instead of using a mix of 705 and R30.
If possible, I will source for FRK to sandwich between the wood frame and the pink fluffy because according to the calculator, this will help reduce mid-high frequency absorption. If I can't find FRK, I will use cellophane instead.
Please let me know if my plans make sense and if not, what recommendations you would have
First of all I'd like to thank all the contributors to this forum and Ethan, I've learnt so much from everything you share.
I recently moved out of a rental apartment and into my own place. Fortunately my wife let me dedicate one bedroom to listening to music (and accomodating her parents when they visit). I'd like to DIY corner bass traps and would really appreciate constructive feedback on my plans layed out below.
I've measured the room at the listening position and below is the frequency response. I've a peak at 45Hz and theoretically, the ideal bass trap for me would be 1.9m/ 75" deep (this is equal to 1/4 the wavelength of 45Hz which is 7.64m/ 301"). This is not feasible.
.The next best alternative I can think of is to build a quarter circle cross section soffit bass trap that has a 50cm/ 19.6" radius, which is a little over 1/16th the wavelength of 45Hz. I do not have space for an ideal square cross section soffit and I predict that a quarter circle would be better than a triangular cross section because no matter the angle of incidence of the soundwave, it would pass through 50cm of porous material before hitting the wall. Based on the acousticmodelling.com calculator, it would perform better if I fill it only with R30 instead of using a mix of 705 and R30.
If possible, I will source for FRK to sandwich between the wood frame and the pink fluffy because according to the calculator, this will help reduce mid-high frequency absorption. If I can't find FRK, I will use cellophane instead.
Please let me know if my plans make sense and if not, what recommendations you would have
