FLM-Tuotanto, Vallila, August 2017

In studio, at FLM-Tuotanto, owned and operated by Ilkka Ferm. Vallila, Helsinki.

PRD panel, made out of EPS (isolation foam) also called styrox. Uncolored.
2 pieces of panels, each 12×13 (columns / rows) with face area 50×50 mm.
Sound dampening range: 850 – 3430 Hz.

Studio, Vallila, July 2017

In studio of Aki Päivärinne. Vallila, Helsinki.

Here, the same type of panel as mentioned above (PRD) is colored by spray paint and a photo of a guitar has been added. (Spray paint was not a success.)

Guitar video

Note: the video opens up in a new window.

Road trip of wood PRD, first prototype

TaloTalo, Vantaa, March 2017

At the stand of Westwood stairs, who was kind to lend me the space.
This acoustic panel is a PRD (prime root diffusor) and made out of wood, measuring corner-to-corner 111×111 cm. Standing 180 cm high on its own mobile stand.

Echo-mitigating frequency range:   830 – 2860 Hz   (design-dependent)
Complete description, sound breaking panel


HTC, Pinta-building, Helsinki, 10th May 2017

One of 4 business-center buildings, this one including an auditorium.

DSC_0173     DSC_0173_

DSC_0181_     DSC_0174

(Photos by Satish Kumar, in connection with the annual PMI Finland conference)

HTC, Nina-building, Ruoholahti, Helsinki, May-June 2017

An office complex of 4 business-center buildings, including auditorium and restaurant.



If you have an idea of where this panel could stand for exposition, please let me know. A successful lead will be rewarded as follows:

Echo1_PRD tour_seek new place_