Ecophon Acoustic Calculator

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	Nimi	Application area	Room type	[-date-]
{{err}}	{{ calculation.name }} {{ calculation.name }} {{ calculation.applicationArea.header }}; {{ calculation.roomType.header }} {{ calculation.date \| date:'yyyy-MM-dd' }}	{{ calculation.applicationArea.header }}	{{ calculation.roomType.header }}	{{ calculation.date \| date:'yyyy-MM-dd' }}		Copy calculation Edit calculation name Send calculation Delete calculation Edit Close Name your calculation Please enter a name for your calculation {{ renameCalculation.error }} Save Cancel Enter recipients email Please enter a valid email address. Please enter recipients email {{ sendPdf.error }} PDF sent Send Cancel {{ deleteCalculation.error }} Delete Cancel Delete calculation Edit Close {{ deleteCalculation.error }} Delete Cancel

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Comparing calculations

Calculation A , {{ comparison.a.name }}

{{ comparison.a.applicationArea.header }}, {{ comparison.a.roomType.header }}

Calculation B , {{ comparison.b.name }}

{{ comparison.b.applicationArea.header }}, {{ comparison.b.roomType.header }}

	Reverberation time T₂₀ (s)		= Speech clarity C₅₀ (dB)		Strength G (dB)
	A	B	A	B	A	B
Diffuse (Sabine)	{{ 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 }}
Non-diffuse	{{ 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 }}
Ecophon recommendation	≤ {{ 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 }}

Reverberation time T₂₀ (s)

Calculation A , {{ comparison.a.name }}

{{ comparison.a.applicationArea.header }}, {{ comparison.a.roomType.header }}

Diffuse (Sabine)

Non-diffuse

Calculation B , {{ comparison.b.name }}

{{ comparison.b.applicationArea.header }}, {{ comparison.b.roomType.header }}

Diffuse (Sabine)

Non-diffuse

Speech clarity C₅₀ (dB)

Calculation A , {{ comparison.a.name }}

{{ comparison.a.applicationArea.header }}, {{ comparison.a.roomType.header }}

Diffuse (Sabine)

Non-diffuse

Calculation B , {{ comparison.b.name }}

{{ comparison.b.applicationArea.header }}, {{ comparison.b.roomType.header }}

Diffuse (Sabine)

Non-diffuse

Strength G (dB)

Calculation A , {{ comparison.a.name }}

{{ comparison.a.applicationArea.header }}, {{ comparison.a.roomType.header }}

Diffuse (Sabine)

Non-diffuse

Calculation B , {{ comparison.b.name }}

{{ comparison.b.applicationArea.header }}, {{ comparison.b.roomType.header }}

Diffuse (Sabine)

Non-diffuse

Your input data

Calculation A , {{ comparison.a.name }} Calculation B , {{ comparison.b.name }}

Room type	{{ comparison.inputDataTab.applicationArea.header }}; {{ comparison.inputDataTab.roomType.header }}
Furnishing	Sparse	Normal	Dense

Room dimensions

Room geometry	Rectangular	Sloped	Irregular
Length	{{ comparison.inputDataTab.dimensions.length \| toFixed:2 }} m
Width	{{ comparison.inputDataTab.dimensions.width \| toFixed:2 }} m
Height	{{ calculation.dimensions.height \| toFixed:2 }} m
Volume	{{ comparison.inputDataTab.dimensions.volume \| toFixed:2 }} m³

Total wall area	{{ comparison.inputDataTab.dimensions.wallArea \| toFixed:2 }} m²
Floor area	{{ comparison.inputDataTab.dimensions.floorArea \| toFixed:2 }} m²
Soffit area	{{ comparison.inputDataTab.dimensions.ceilingArea \| toFixed:2 }} m²
Height up to suspended ceiling	{{ comparison.inputDataTab.ceiling.distanceFromFloorToCeiling \| toFixed:2 }} m

Absorption input data

Suspended : {{ comparison.inputDataTab.ceiling.product.header }} ({{ comparison.inputDataTab.ceiling.quantity }} unit ) ({{ comparison.inputDataTab.ceiling.quantity }} units )

Wall {{ wall.index + 1 }} ({{ wall.area | toFixed:2 }} m²)

Wall surface : {{ wall.surface.header }} Show coefficients

System : {{ wall.panels[0].product.header }} ({{ wall.panels[0].area | toFixed:2 }} m²) ({{ wall.panels[0].quantity }} unit ) ({{ wall.panels[0].quantity }} units ) Show coefficients

Door : Door {{ $index + 1 }} : {{ door.surface.header }} ({{ door.area | toFixed:2 }} m²) Show coefficients

Window : Window {{ $index + 1 }} : {{ window.surface.header }} ({{ window.area | toFixed:2 }} m²) Show coefficients

Floor : {{ comparison.inputDataTab.floor.surface.header }}

Soffit : {{ comparison.inputDataTab.ceiling.surface.header }}

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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.

Application area Please select a value

Room type Please select a value

By using this tool you agree to our terms and conditions

Please make sure you understand and agree with our terms and conditions before using our calculator

Room dimensions

Select room geometry

Rectangular Rectangular room with horizontal soffit

Sloped Rectangular room with a sloped soffit

Irregular Rooms with more than four walls

Please select a value

Room dimensions (in meters )

A: Wall length (meters) Please enter a valid number Please enter a value The value is too large B: Wall width (meters) Please enter a valid number Please enter a value C: Wall height (meters) Please enter a valid number Please enter a value

Room dimensions (in meters )

A: Wall length (meters) Please enter a valid number Please enter a value B: Wall width (meters) Please enter a valid number Please enter a value C: Wall height (meters) Please enter a valid number Please enter a value D: Wall height (meters) Please enter a valid number Please enter a value

Room dimensions (in meters )

Wall height (meters) Please enter a valid number Please enter a value

Floor/ceiling area (m²) Please enter a valid number Please enter a value

Wall {{ $index + 1 }} width (meters) Remove Please enter a valid number Please enter a value

Add another wall

Dimensions
Volume	{{ calculation.dimensions.volume \| toFixed:2 }} m³
Wall area	{{ calculation.dimensions.wallArea \| toFixed:2 }} m²
Soffit area	{{ calculation.dimensions.ceilingArea \| toFixed:2 }} m²
Floor area	{{ calculation.dimensions.floorArea \| toFixed:2 }} m²

Room surfaces

Wall {{ $index + 1 }}	Edit
Soffit	Edit
Floor	Edit

Wall {{ calculation.editing.index + 1 }} {{ calculation.editing.area | toFixed:2 }} m²

Wall surface Please select a value Number of doors on wall Please select a value Number of windows on wall Please select a value

Soffit

Soffit Surface Please select a value

Floor

Floor surface Please select a value

Door {{ $index + 1 }} surface Please select a value

Door {{ $index + 1 }} area (m²) Please enter a valid number Please enter a value

Window {{ $index + 1 }} surface

Window {{ $index + 1 }} area (m²) Please enter a valid number Please enter a value

Warning: Doors and windows combined are larger than wall area

Go to next wall Go to soffit

Go to floor

Adding absorption

1. Ceiling

1: Family Please select a value 2: Product Please select a value 3: Distance from floor to ceiling (m) Please enter a valid number Please enter a value Distance from floor to ceiling cant not be greater than Wall height: {{ calculation.dimensions.height }} meters. Wall height (meters) {{calculation.dimensions.height}}

4: Quantity (pcs) Please enter a valid number Please enter a value

Adding absorption

2. Wall panels

Wall {{ $index + 1 }} {{ wall.area | toFixed:2 }} m²

Panel Please select a value Please select a value Area (m²) Please enter a valid number Please enter a value Quantity (pcs) Please enter a valid number Please enter a value

Furnishing

Sparse A sparse room is characterized by a small amount of furniture or equipment and bare walls which are sound reflecting. A classroom, conference room or office mainly furnished with tables and non-upholstered chairs over the floor area and very few cupboards or shelfs along the walls may be an example.

Normal A normal furnished room means a room with furniture over the floor area and along the walls. A classroom, office or conference room with tables and chairs over the floor area and shelfs and cupboards along the walls may be an example.

Dense A dense furnished room is a room with a large amount of furniture and equipment and where some of the furniture's are upholstered like office chairs and sofas. A care room with beds in a hospital can be considered as a densely furnished room.

Please select a value

Results and Ecophon recommendation

Your calculation: {{ calculation.name }}

Reverberation time T₂₀ (s)

Sabine calculation

{{ calculation.recommendation.T20.diffuseCalculation | toFixed:2 }}

RAC calculation

{{ calculation.recommendation.T20.nonDiffuseCalculation | toFixed:2 }}

Ecophon recommendation

≤ {{ calculation.recommendation.T20.recommendedValue }}

Speech clarity C₅₀ (dB)

Sabine calculation

{{ calculation.recommendation.C50.diffuseCalculation | toFixed:2 }}

RAC calculation

{{ calculation.recommendation.C50.nonDiffuseCalculation | toFixed:2 }}

Ecophon recommendation

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

Strength G (dB)

Sabine calculation

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

RAC calculation

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

Ecophon recommendation

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

Note: Average bonds over octave bands 125 to 4000Hz.

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.

Tühjenda ruum

Luba tühja ruumi arvutuste kaasamine

NB. ‘Empty room’ is based on the same room properties and furnishing, but without any ceiling- or wall panel absorbers. The volume of the room is calculated to soffit.

Reverberation time T₂₀ (s)

Sabine calculation

RAC calculation

Tühjenda ruumi arvutused

Speech clarity C₅₀ (dB)

Sabine calculation

RAC calculation

Tühjenda ruumi arvutused

Strength G (dB)

Sabine calculation

RAC calculation

Tühjenda ruumi arvutused

Include empty room in PDF

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New calculation

Your input data

Room type	{{ calculation.applicationArea.header }}; {{ calculation.roomType.header }}
Furnishing	Sparse	Normal	Dense

Room dimensions

Room geometry	Rectangular	Sloped	Irregular
Length	{{ calculation.dimensions.length \| toFixed:2 }} m
Width	{{ calculation.dimensions.width \| toFixed:2 }} m
Height	{{ calculation.dimensions.height \| toFixed:2 }} m
Volume	{{ calculation.dimensions.volume \| toFixed:2 }} m³

Total wall area	{{ calculation.dimensions.wallArea \| toFixed:2 }} m²
Floor area	{{ calculation.dimensions.floorArea \| toFixed:2 }} m²
Soffit area	{{ calculation.dimensions.ceilingArea \| toFixed:2 }} m²
Height up to suspended ceiling	{{ calculation.ceiling.distanceFromFloorToCeiling \| toFixed:2 }} m

Absorption input data

Suspended : {{ calculation.ceiling.product.header }} ({{ calculation.ceiling.quantity }} unit ) ({{ calculation.ceiling.quantity }} units )

Wall {{ wall.index + 1 }} ({{ wall.area | toFixed:2 }} m²)

Wall surface : {{ wall.surface.header }} Show coefficients

System : {{ wall.panels[0].product.header }} ({{ wall.panels[0].area | toFixed:2 }} m²) ({{ wall.panels[0].quantity }} unit ) ({{ wall.panels[0].quantity }} units ) Show coefficients

	Reverberation time T₂₀ (s)		= Speech clarity C₅₀ (dB)		Strength G (dB)
	A	B	A	B	A	B
Diffuse (Sabine)	{{ 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 }}
Non-diffuse	{{ 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 }}
Ecophon recommendation	≤ {{ 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 }}

Comparing calculations

Reverberation time T20 (s)

Speech clarity C50 (dB)

Strength G (dB)

Your input data

Room dimensions

Absorption input data

Suspended : {{ comparison.inputDataTab.ceiling.product.header }} ({{ comparison.inputDataTab.ceiling.quantity }} unit ) ({{ comparison.inputDataTab.ceiling.quantity }} units )

Wall {{ wall.index + 1 }} ({{ wall.area | toFixed:2 }} m²)

Wall surface : {{ wall.surface.header }} Show coefficients

System : {{ wall.panels[0].product.header }} ({{ wall.panels[0].area | toFixed:2 }} m²) ({{ wall.panels[0].quantity }} unit ) ({{ wall.panels[0].quantity }} units ) Show coefficients

Door : Door {{ $index + 1 }} : {{ door.surface.header }} ({{ door.area | toFixed:2 }} m²) Show coefficients

Window : Window {{ $index + 1 }} : {{ window.surface.header }} ({{ window.area | toFixed:2 }} m²) Show coefficients

Floor : {{ comparison.inputDataTab.floor.surface.header }}

Soffit : {{ comparison.inputDataTab.ceiling.surface.header }}

Room dimensions

Room dimensions (in meters )

Room dimensions (in meters )

Room dimensions (in meters )

Room surfaces

Wall {{ calculation.editing.index + 1 }} {{ calculation.editing.area | toFixed:2 }} m²

Soffit

Floor

1. Ceiling

2. Wall panels

Wall {{ $index + 1 }} {{ wall.area | toFixed:2 }} m²

Furnishing

Results and Ecophon recommendation

Your calculation: {{ calculation.name }}

Sabine calculation

RAC calculation

Ecophon recommendation

Sabine calculation

RAC calculation

Ecophon recommendation

Sabine calculation

RAC calculation

Ecophon recommendation

Reverberation time T20 (s)

Speech clarity C50 (dB)

Strength G (dB)

Your input data

Room dimensions

Absorption input data

Suspended : {{ calculation.ceiling.product.header }} ({{ calculation.ceiling.quantity }} unit ) ({{ calculation.ceiling.quantity }} units )

Wall {{ wall.index + 1 }} ({{ wall.area | toFixed:2 }} m²)

Wall surface : {{ wall.surface.header }} Show coefficients

System : {{ wall.panels[0].product.header }} ({{ wall.panels[0].area | toFixed:2 }} m²) ({{ wall.panels[0].quantity }} unit ) ({{ wall.panels[0].quantity }} units ) Show coefficients

Door : Door {{ $index + 1 }} : {{ door.surface.header }} ({{ door.area | toFixed:2 }} m²) Show coefficients

Window : Window {{ $index + 1 }} : {{ window.surface.header }} ({{ window.area | toFixed:2 }} m²) Show coefficients

Floor : {{ calculation.floor.surface.header }}

Soffit : {{ calculation.ceiling.surface.header }}

Reverberation time T₂₀ (s)

Speech clarity C₅₀ (dB)

Reverberation time T₂₀ (s)

Speech clarity C₅₀ (dB)