Bass absorber with membrane (cornel)

The sound absorption characteristics of the wood membrane bass absorber:

wood membrane corner bass trap

The photo below shows the measurement result of a 109x64x22cm membrane bass absorber.
The photo illustrates that our membrane bass absorber is the most effective in dampening the low frequencies.30-150Hz

The acoustic characteristics of the double leather membrane bass trap:

The placement of the wood membrane bass trap

acoustic measurement sound pressure value

 

You can cease or improve these anomalies by placing bass traps in corners.

Myths

I heard it many times that wood and leather do not suit acoustic treatment purposes since the sound cannot go through them.

Luckily it is not the case!

If the sound did not go through them then by applying simple acoustic imitation of leather we could prevent that our neighbours hear our favourite music when we turn up the volume a bit. If it were true it would be the simplest sound insulation solution in the world.

Naturally sound waves do go through them. But luckily not at every frequency. Every material has its own sound absorbing and sound transmission coefficients.

Taking into account these factors we design our membrane bass traps in order to become the most effective ones and with the goal to leave the high frequencies untouched since above 600hz the sound waves really won’t go through the leather material. By this we can ensure perfect linearity in sounding of studios, hi-fi and home theatre rooms.

For example, if the furniture and the carpets overdampen the high frequencies compared to the bass in a specific room then we can apply imitation of leather or wood membrane. Before placing these units into the room, we can easily identify the acoustic anomalies by running an acoustic measurement.

Here you can see a RT60 reverberation time with uneven sound transmission

On the graph above you can see the overdampening of high frequencies within a room while the low frequencies are continuously rising, squeezing out the high frequency and the real bass. In this case not the real bass would exceed but its reverberation. It creates an undynamic, continuously rumbling bass which can hide the details.

In this case if we place in the corner one or more imitation of leather or wood membrane bass traps the reverberation would decrease significantly, but only at the lower frequencies thanks to the membranes.

If we use standard broadband bass traps in such case, the high frequencies would go down as well parallel with reverberation which is not a preferred result if we would like to achieve the most even sound.

The impact of the sound absorbing panel within a room

If we would like to achieve such an even reverberation in our room then we must use membrane bass traps!