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{{ comparison.result.a.T20.diffuseCalculation | toFixed:2 }} {{ comparison.result.b.T20.diffuseCalculation | toFixed:2 }} {{ comparison.result.a.C50.diffuseCalculation | toFixed:2 }} {{ comparison.result.b.C50.diffuseCalculation | toFixed:2 }} {{ comparison.result.a.G.diffuseCalculation | toFixed:2 }} {{ comparison.result.b.G.diffuseCalculation | toFixed:2 }}
{{ comparison.result.a.T20.nonDiffuseCalculation | toFixed:2 }} {{ comparison.result.b.T20.nonDiffuseCalculation | toFixed:2 }} {{ comparison.result.a.C50.nonDiffuseCalculation | toFixed:2 }} {{ comparison.result.b.C50.nonDiffuseCalculation | toFixed:2 }} {{ comparison.result.a.G.nonDiffuseCalculation | toFixed:2 }} {{ comparison.result.b.G.nonDiffuseCalculation | toFixed:2 }}
≤ {{ comparison.result.a.T20.recommendedValue | toFixed:2 }} ≤ {{ comparison.result.b.T20.recommendedValue | toFixed:2 }} ≥ {{ comparison.result.a.C50.recommendedValue | toFixed:2 }} ≥ {{ comparison.result.b.C50.recommendedValue | toFixed:2 }} ≤ {{ comparison.result.a.G.recommendedValue | toFixed:2 }} ≤ {{ comparison.result.b.G.recommendedValue | toFixed:2 }}

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The calculator estimates the room acoustical parameters reverberation time T20, Speech Clarity C50, and Sound Strength G. The parameters are defined in ISO 3382 part 1 and 2.

The calculations are performed under both diffuse and non-diffuse sound field conditions.The reverberation time according to Sabine’s formula, which assumes a diffuse sound field, is calculated for all cases. The Sabine calculation follows the procedure outlined in EN 12354-6.

The non-diffuse conditions typically appear in rooms were a suspended absorbent ceiling dominates the sound absorption in the room. The non-diffuse condition is checked by the calculator and if the requirements are fulfilled the room acoustic parameters T20, C50 and G are calculated.

Ecophon recommendations of appropriate parameter values are given for all room types. The recommendations are based on our experience up until today.

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1.

2.

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≥ {{ calculation.recommendation.C50.recommendedValue }}

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{{ calculation.recommendation.G.nonDiffuseCalculation | toFixed:2 }}

≤ {{ calculation.recommendation.G.recommendedValue }}

Ecophon recommendations are based on our experience up until today and might be subject to change in the future.

Room Acoustic Comfort (RAC) calculations for rooms with absorbing ceilings. This calculation will give a better correspondence to measurements than Sabine formula.

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