I’d like to make a DIY bass traps to reduce dips around 80hz ~ 100hz in my room. Pre-made bass traps I found are very expensive, or don’t actually absorb low frequency sound much.
I recently learned that helmholtz resonator could absorb lower frequency only. Is it that simple as making a wooden box with many holes on one of 6 sides and some absorbers in it?
- Make a thin wooden box with 600mm height, 600mm width, and 100mm thickness. The thickness of the front panel is 15mm.
- Drill holes to the one of 6 sides of the box.
- Seal the box with silicone tape.
- Put absorber materials with 600mm width, 600mm height, 90mm thickness in the box.
I calculated absorber dimensions with this calculator. I just changed the absorber thickness to 90mm from 100mm. But is the 100mm thickness enough?
Even if could make a resonator successfully, do I need to make 8 panels or so to make meaningful changes to the room mode (since each panel is small)?
http://www.acousticmodelling.com/helmholtz.php
Very difficult you will likely miss and not make enough of them.
Most rooms have dips between 80 and 100hz…often it is SBIR.
You can try putting speakers closer to wall and adjusting your listening position.
A good place to put bass traps is right behind the speakers in addition to the corners near the speakers.