Silen Sound test report by Hirzlan

We bring silence everywhere

SUMMARY

Measurements of sound insulation and speech reduction

Measured products

Chatbox Single

Chatbox Duo

Chatbox Quattro

Space 1

Space 2

Space 4

Space Max

Measurements for R’w and STC were conducted at the Silen showroom in Tallinn, Estonia

Measurements for ISO 23351-1 were measured at Turku University of Applied Sciences, Acoustics Laboratory

Measurements included

Airborne sound insulation indices R’w – Measurement of external sound reduction between two rooms in a building. In this case the emitting room was the office/showroom and the receiving room was the product. Testing covers a wide frequency range: 50 Hz to 5000 Hz.

Sound transmission classes STC – Standard test method for the measurement of airborne sound transmission loss of building partitions and elements. Method results in a sound transmission loss between two rooms. In this case the emitting room was the office/showroom and the receiving room was the product. Testing covers a wide frequency range: 50 Hz to 5000 Hz.

Speech level reduction indices – Method to facilitate the comparison of furniture enclosures with respect to their ability to reduce the speech level of the occupant speaking inside the product. Measurement consists of measuring the test signal produced by the sound source in an empty room while the product is absent. Afterwards the test signal produced by the sound source is located inside the product in the occupant’s position. The difference of the sound power levels measured is the level reduction. Testing covers a wide frequency range: 125 Hz to 8000 Hz.

R’w and STC measurements carried out on: 19.08.2020

ISO23351-1 Measurements carried out 06.09.2022

Measurements based on normative documents: ISO 16283-1, ISO 717-1, ISO 23351-1, ASTM E-90

R’w and STC measurements carried out by Akukon Eesti OÜ

ISO23351-1 Measurements carried out by Turku University of Applied Sciences, Acoustics Laboratory

Accreditations available upon request Official test report available upon request

RESULTS

Airborne sound insulation indices R’w

Product model R’w (C; Ctr),dB

Chatbox

Sound transmission classes STC

Product model STC, dB

Measurement report

Chatbox Single 35 Akukon 201038-M08 Space 1 41 Akukon 201038-M09 Space 2 43 Akukon 201038-M10 Space 6

Akukon 201038-M11

Akukon 201038-M12 Space Max

Measurements were done on site not in a laboratory. This method increses the reliability of the result for the end user, meaning the end user can expect the same results at their location.

We bring silence everywhere

NEW STANDARD 2020 – ISO 23351-1

Speech level reduction indices

Product model DS,A , dB

Chatbox Single 27,3

Chatbox Duo 29,4

Chatbox Quattro 30,2

Space 1 30,1

Class B

Class A

SY24-002a EN

SY24-002b EN

SY24-002c EN

SY22-72d EN

Space 2 30,4 Class A SY24-015b EN

Space 4 31,9 Class A SY24-015c EN

Space Max 31,1 Class A SY24-015d EN

Measurements carried out in a laboratory. Products also tested on-site for verification of number in actual use. Testing was partially done with standard furniture inside.