Iron Tribe Manila

17/02/2025

"My 2-inch foam panels were effective in deadening my studio, but...."
True, 2-inch absorption panels can reduce the room reflections in your room because most 2-in. panels can effectively absorb mid to high frequencies (250 Hz - 20kHz).
Our sense (or feel) of the room is mostly due to the mids and highs, and so dampening (or deadening) these frequencies makes us believe that we have achieved a well-treated room.
2-inch panels have no significant absorption for low frequencies (20 Hz - 200 Hz). As shown by the graph below, absorption drops to a hardly significant .2 absorption coefficient at 200 Hz (blue curve). Increasing the density of the 2" panel (green curve) hardly makes any difference.
If you work with voice-overs or narrations, then 2-in. panels are adequate. For music, low frequencies are a major component of the sound. Music (or soundtrack) playback will definitely result in low-frequency room reverberation that you have to control and absorb.
Increasing the thickness of your panels is the only way to reach the low frequencies and make significant absorption. (Advanced ways to absorb the lows include using Helmholtz resonators or membrane absorbers.) The thicker the porous absorbers, the better the low frequency absorption.
4" panels 2' x 4' x 4": P2400
6" panels 2" x 4" x 6": P2600
6" corner absorbers 2' x 4' x 10" (w/ air gap): P2600

31/01/2025

"My 2-inch foam panels were effective in deadening my studio, but...."

True, 2-inch absorption panels can reduce the room reflections in your room because most 2-in. panels can effectively absorb mid to high frequencies (250 Hz - 20kHz).

Our sense (or feel) of the room is mostly due to the mids and highs, and so dampening (or deadening) these frequencies makes us believe that we have achieved a well-treated room.

2-inch panels have no significant absorption for low frequencies (20 Hz - 200 Hz). As shown by the graph below, absorption drops to a hardly significant .2 absorption coefficient at 200 Hz (blue curve). Increasing the density of the 2" panel (green curve) hardly makes any difference.

If you work with voice-overs or narrations, then 2-in. panels are adequate. For music, low frequencies are a major component of the sound. Music (or soundtrack) playback will definitely result in low-frequency room reverberation that you have to control and absorb.

Increasing the thickness of your panels is the only way to reach the low frequencies and make significant absorption. (Advanced ways to absorb the lows include using Helmholtz resonators or membrane absorbers.) The thicker the porous absorbers, the better the low frequency absorption.

4" panels 2' x 4' x 4": P2400
6" panels 2" x 4" x 6": P2600
6" corner absorbers 2' x 4' x 10" (w/ air gap): P2600

11/01/2025

You don't need to completely eliminate the reverb, but just shorten it to the apt length depending on your room size and activity. Reverb from low frequencies are more concerning. Absorb excess reverb with these absorption panels, starting at 4 in. thickness, though 6 in. is better. You can add 2" air gaps at the back of 4" panels, and get the same benefits of a 6"panel.

4"×2'×4' panels: P2400
6"×2'×4' panels: P2600
6"(10")×2'×4' corner absorber: P2600

Dodjie Fernandez

06/01/2025

Are 2-inch foam panels effective absorbers?

Popular music in general has relatively louder levels in the low to low-mid frequencies (20 Hz ~ 800 Hz) (see pic), as compared to the high frequencies (6 kHz up). Also, a sound’s wavelength becomes longer as the frequency (or pitch) goes lower. That is why low to low-mid frequencies can easily fill up a room and bounce around more ably than the high frequencies. While higher frequencies are more directional (like flashlights), low frequencies are like water, having the ability to spread everywhere.
We should therefore be more concerned with controlling the reflections from low frequencies since they are more capable of smearing and distorting the direct sound coming from speakers and other sound sources. Foam, curtains, carpet, upholstered furniture, and people, can sufficiently absorb reflections from high frequencies, but not low frequencies.
Thus, foam panels are effective in absorbing reflections from high-mid to high frequencies only, but are insignificant with regards to the more problematic reflections from low-mid to low frequencies.
Absorbing low frequencies is much harder, requiring proper selection of insulation materials and thickness. The good thing is, these low frequency absorbers also absorb mid to high frequencies as effectively as any other material.
Pictured below are 4-inch thick broadband absorption panels measuring 2 ft. by 4 ft, and 6-inch thick corner broadband absorbers 1.7’ x 4’ (with 4” air gap). Their design allows for accommodating air gaps at the back, thereby improving low frequency absorption. Though stocks are limited, we accept orders. Feel free to message us for inquiries.

4" panels 2' x 4' x 4": P2400
6" panels 2" x 4" x 6": P2600
6" corner absorbers 2' x 4' x 10" (w/ air gap): P2600

04/01/2025

Start acoustic treatment here.

In your home theater, music room, or recording studio, you do not want sound reflections from the walls and ceiling to interfere with and muddle the direct sound from your valuable speakers.

We can significantly reduce these pesty reflections by putting sound absorbers on the walls and ceiling. The first parts of the walls that need to be treated are those that are earliest hit by the sound from the speakers. These wall parts are called early reflection points.

Early reflection points are found at the left and right walls of the main left-right speakers. They span the wall area between the main speakers and your listening position. The ceiling parts (and floor parts) between the speakers and your location are early reflection points also.

4" panels (4' x 2' x 4"): P2400
6" panels (4' x 2' x 6"): P2600
6" Corner Absorbers (4' x 2' x 10" w/ air gap)): P2600

Dodjie Fernandez

04/10/2024

Caption this.

Dodjie Fernandez

05/07/2024

Metro Manila Headline: "Pajero Owner Reports Missing Spare Tire!"

Coffee Tire Table for sale. Model 245. Great for seating too. Comes with storage for miscellaneous items. 73 cm x 47 cm (28.75" x 18.5"). P2995.

10/04/2024