80 Worked Acoustic Calculation Examples
Step-by-step Sabine RT60 calculations for real rooms with real materials. Every example shows the full working, octave-band results, and a compliance verdict against international acoustic standards. Filter by room category, difficulty, or compliance outcome.
Category
Difficulty
Compliance
Showing 80 of 80 examples
EducationBB93PASS
UK Primary Classroom — BB93 Acoustic Compliance
9m × 7m × 3mRT60 = 0.31s
Target: 0.6sBeginner
EducationBB93MARGINAL
UK Secondary Classroom — BB93 Marginal Result
10m × 8m × 3mRT60 = 0.64s
Target: 0.6sBeginner
EducationANSI-S12-60PASS
US Classroom — ANSI S12.60 Acoustic Compliance
9m × 8m × 2.7mRT60 = 0.28s
Target: 0.6sBeginner
EducationDIN-18041PASS
German Classroom — DIN 18041 Acoustic Design
8m × 7m × 3.2mRT60 = 0.43s
Target: 0.4–0.6sIntermediate
EducationNCC-AS2107PASS
Australian Classroom — NCC/AS 2107 Compliance
10m × 7m × 2.7mRT60 = 0.29s
Target: 0.5sBeginner
EducationBS-8233PASS
University Lecture Theatre — BS 8233 Design
15m × 12m × 4.5mRT60 = 0.68s
Target: 0.6–1sIntermediate
EducationBB93PASS
School Music Room — BB93 Acoustic Design
10m × 8m × 3.5mRT60 = 0.9s
Target: 0.8–1sIntermediate
EducationBB93PASS
School Library — BB93 Quiet Study Space
12m × 10m × 3mRT60 = 0.31s
Target: 0.6sBeginner
EducationBB93FAIL
School Gymnasium — BB93 Non-Compliant Case
24m × 15m × 7mRT60 = 3.08s
Target: 1.5sAdvanced
EducationBB93PASS
SEN Classroom — BB93 Enhanced Acoustic Target
8m × 6m × 2.7mRT60 = 0.24s
Target: 0.4sIntermediate
EducationDIN-18041PASS
Kindergarten Playroom — DIN 18041 Acoustic Design
10m × 8m × 3mRT60 = 0.45s
Target: 0.4–0.6sIntermediate
EducationBB93PASS
School Assembly Hall — BB93 Multi-Use Space
18m × 12m × 5mRT60 = 0.86s
Target: 0.8–1.2sAdvanced
EducationWELL-F74PASS
University Tutorial Room — WELL F74 Compliance
6m × 5m × 2.7mRT60 = 0.24s
Target: 0.6sBeginner
EducationNRAPASS
French Classroom — NRA 2000 Acoustic Compliance
9m × 7m × 3mRT60 = 0.43s
Target: 0.4–0.8sIntermediate
EducationNBR-15575PASS
Brazilian University Auditorium — NBR 15575
16m × 10m × 4mRT60 = 0.52s
Target: 1sAdvanced
EducationANSI-S12-60PASS
School Science Lab — ANSI S12.60 Compliance
11m × 8m × 3mRT60 = 0.36s
Target: 0.6sIntermediate
OfficeBS-8233PASS
Open Plan Office — BS 8233 Acoustic Design
20m × 15m × 2.7mRT60 = 0.3s
Target: 0.5sBeginner
OfficeBS-8233PASS
Small Meeting Room — BS 8233 Acoustic Design
5m × 4m × 2.7mRT60 = 0.23s
Target: 0.6sBeginner
OfficeWELL-F74PASS
Executive Boardroom — WELL F74 Premium Finish
10m × 6m × 3mRT60 = 0.31s
Target: 0.6sIntermediate
OfficeISO-3382PASS
Co-working Space — Industrial Conversion Acoustics
16m × 12m × 3.5mRT60 = 0.55s
Target: 0.6sAdvanced
OfficeASHRAEPASS
Private Office — ASHRAE Acoustic Guidelines
4m × 3.5m × 2.7mRT60 = 0.24s
Target: 0.6sBeginner
OfficeBS-8233PASS
Call Centre — BS 8233 Speech Privacy Design
25m × 18m × 2.7mRT60 = 0.31s
Target: 0.5sIntermediate
OfficeDIN-18041PASS
Conference Room — DIN 18041 Acoustic Design
8m × 6m × 3mRT60 = 0.43s
Target: 0.4–0.7sIntermediate
OfficeBS-8233FAIL
Startup Office — Exposed Concrete Acoustic Failure
14m × 10m × 3.8mRT60 = 2.73s
Target: 0.6sBeginner
OfficeIBCPASS
Government Office — IBC Open Plan Compliance
12m × 8m × 2.7mRT60 = 0.28s
Target: 0.6sBeginner
OfficeBS-8233FAIL
Architect Studio — Baffles in Exposed Concrete
15m × 10m × 4mRT60 = 0.68s
Target: 0.6sAdvanced
OfficeWELL-F74PASS
Hot-Desking Floor — WELL F74 Open Plan Design
22m × 16m × 2.7mRT60 = 0.3s
Target: 0.5sIntermediate
OfficeBS-8233PASS
Creative Agency — Timber Ceiling and Green Wall
12m × 8m × 3mRT60 = 0.36s
Target: 0.6sIntermediate
OfficeBS-8233FAIL
Trading Floor — Hard Flooring Acoustic Failure
30m × 20m × 3mRT60 = 0.56s
Target: 0.5sAdvanced
OfficeNCC-AS2107PASS
Serviced Office Suite — NCC/AS 2107 Compliance
6m × 5m × 2.7mRT60 = 0.23s
Target: 0.6sBeginner
OfficeBS-8233PASS
Office Podcast Studio — Recording Booth Design
3.5m × 3m × 2.7mRT60 = 0.12s
Target: 0.3sIntermediate
OfficeWELL-F74PASS
Law Firm — Premium WELL F74 Acoustic Plaster
18m × 14m × 2.7mRT60 = 0.34s
Target: 0.5sAdvanced
HealthcareBS-8233PASS
Hospital Ward — BS 8233 Patient Recovery
8m × 6m × 2.7mRT60 = 0.33s
Target: 1sIntermediate
HealthcareBS-8233PASS
GP Consulting Room — Speech Privacy Design
4m × 3.5m × 2.7mRT60 = 0.25s
Target: 0.6sBeginner
HealthcareISO-3382PASS
Operating Theatre — Cleanroom Acoustic Design
7m × 6m × 3mRT60 = 0.36s
Target: 0.6sAdvanced
HealthcareBS-8233PASS
Dental Surgery — Acoustic Treatment for Anxiety
4.5m × 3.5m × 2.7mRT60 = 0.27s
Target: 0.6sBeginner
HealthcareISO-3382PASS
MRI Suite — Patient Acoustic Comfort Design
8m × 5m × 3mRT60 = 0.36s
Target: 0.8sAdvanced
HealthcareBS-8233PASS
Hospital Reception — Waiting Area Acoustics
10m × 8m × 3mRT60 = 0.45s
Target: 1sIntermediate
HealthcareBS-8233PASS
Care Home Lounge — Elderly Hearing-Optimised
8m × 7m × 2.7mRT60 = 0.28s
Target: 0.8sBeginner
HealthcareBS-8233FAIL
Physiotherapy Gym — Excessive Reverberation
14m × 10m × 3.5mRT60 = 1.47s
Target: 1sAdvanced
HealthcareNBR-15575MARGINAL
Hospital Patient Bedroom — NBR 15575 Compliance
5m × 3m × 2mRT60 = 0.35s
Target: 0.4–0.6sIntermediate
HealthcareBS-8233PASS
Mental Health Quiet Room — BS 8233 Compliance
8m × 6m × 2.5mRT60 = 0.41s
Target: 0.4–0.6sIntermediate
HealthcareASHRAEPASS
Emergency Room Waiting Area — ASHRAE NC 35-40
25m × 10m × 2mRT60 = 0.63s
Target: 0.6–1sIntermediate
HealthcareASHRAEPASS
Pathology Laboratory — ASHRAE NC 35-45 Compliance
10m × 8m × 2.5mRT60 = 0.61s
Target: 0.4–0.7sIntermediate
HospitalityBS-8233PASS
Restaurant Dining Room — BS 8233 Acoustic Design
20m × 10m × 2mRT60 = 0.62s
Target: 0.6–0.8sIntermediate
HospitalityBS-8233PASS
Hotel Bedroom — BS 8233 Sleep Quality Design
5m × 4m × 2.5mRT60 = 0.51s
Target: 0.3–0.6sIntermediate
HospitalityASHRAEPASS
Hotel Lobby — ASHRAE RC 35-40 Design
15m × 10m × 4mRT60 = 1.03s
Target: 0.8–1.2sIntermediate
HospitalityNRAMARGINAL
Bar/Lounge — NRA French Acoustic Regulation
15m × 10m × 2mRT60 = 0.53s
Target: 0.6–0.9sIntermediate
HospitalityWELL-F74MARGINAL
Spa Treatment Room — WELL Feature 74 Compliance
5m × 3m × 2mRT60 = 0.26s
Target: 0.3–0.5sIntermediate
HospitalityDIN-18041MARGINAL
Conference Facility — DIN 18041 Speech Clarity
25m × 10m × 2mRT60 = 0.43s
Target: 0.5–0.7sIntermediate
HospitalityASHRAEMARGINAL
Hotel Ballroom — ASHRAE Multi-Use Acoustic Design
30m × 20m × 2.5mRT60 = 0.87s
Target: 1–1.5sIntermediate
HospitalityBS-8233PASS
Neighbourhood Cafe — BS 8233 Acoustic Comfort
10m × 6m × 2.5mRT60 = 0.58s
Target: 0.5–0.8sIntermediate
HospitalityNRAPASS
Fine Dining Restaurant — NRA French Standard
12.5m × 10m × 2mRT60 = 0.4s
Target: 0.4–0.6sIntermediate
HospitalityBS-8233MARGINAL
Hotel Corridor — BS 8233 Flanking Noise Control
20m × 2m × 2.5mRT60 = 0.39s
Target: 0.4–0.8sIntermediate
HospitalityBS-8233PASS
Wedding Venue — BS 8233 Multi-Use Design
20m × 16m × 2.5mRT60 = 0.8s
Target: 0.8–1.2sIntermediate
HospitalityASHRAEPASS
Airport Business Lounge — ASHRAE RC 35-40
40m × 10m × 2.5mRT60 = 0.61s
Target: 0.6–1sIntermediate
PerformanceISO-3382MARGINAL
Concert Hall — ISO 3382-1 Acoustic Performance
40m × 25m × 8mRT60 = 2.31s
Target: 1.8–2.2sIntermediate
PerformanceISO-3382MARGINAL
Recital Hall — ISO 3382 Chamber Music Design
25m × 15m × 4mRT60 = 1.23s
Target: 1.4–1.8sIntermediate
PerformanceBS-8233PASS
Cinema Auditorium — BS 8233 Low Reverberation Design
20m × 20m × 5mRT60 = 0.44s
Target: 0.3–0.5sIntermediate
PerformanceISO-3382PASS
Recording Studio Control Room — EBU Standard
5m × 4m × 4mRT60 = 0.24s
Target: 0.2–0.3sIntermediate
PerformanceDIN-18041PASS
Rehearsal Room — DIN 18041 Music Practice Design
10m × 8m × 2.5mRT60 = 0.89s
Target: 0.8–1.2sIntermediate
PerformanceISO-3382PASS
Mosque — ISO 3382 Quranic Recitation Acoustics
30m × 20m × 5mRT60 = 1.91s
Target: 1.5–2sIntermediate
PerformanceISO-3382PASS
Church — ISO 3382 Liturgical Music Acoustics
25m × 20m × 5mRT60 = 2.39s
Target: 1.5–2.5sIntermediate
PerformanceBS-8233MARGINAL
Theatre Auditorium — BS 8233 Speech Optimised
25m × 15m × 4mRT60 = 0.61s
Target: 0.7–1sIntermediate
PerformanceISO-3382PASS
Podcast Studio — Best Practice Voice Recording
4m × 2.5m × 2mRT60 = 0.16s
Target: 0.15–0.3sIntermediate
PerformanceDIN-18041PASS
Band Practice Room — DIN 18041 Music Rehearsal
5m × 5m × 4mRT60 = 0.41s
Target: 0.4–0.8sIntermediate
PerformanceISO-3382MARGINAL
Opera House — ISO 3382 Vocal Projection Design
30m × 25m × 8mRT60 = 1.73s
Target: 1.2–1.6sIntermediate
PerformanceBS-8233MARGINAL
Community Hall — BS 8233 Multi-Purpose Design
25m × 16m × 2.5mRT60 = 0.69s
Target: 0.8–1.2sIntermediate
ResidentialBS-8233PASS
Living Room — BS 8233 Residential Comfort
6m × 5m × 2mRT60 = 0.5s
Target: 0.4–0.6sIntermediate
ResidentialISO-3382MARGINAL
Home Cinema — THX Reference Standard Design
5m × 4m × 2mRT60 = 0.17s
Target: 0.2–0.4sIntermediate
ResidentialNBR-15575PASS
Apartment Bedroom — NBR 15575 Brazilian Standard
5m × 3m × 2mRT60 = 0.43s
Target: 0.3–0.5sIntermediate
ResidentialBS-8233MARGINAL
Open-Plan Kitchen-Living — BS 8233 Design
10m × 6m × 2mRT60 = 0.81s
Target: 0.5–0.8sIntermediate
ResidentialBS-8233PASS
Home Office — BS 8233 Video Call Optimised
4m × 2.5m × 2mRT60 = 0.38s
Target: 0.2–0.4sIntermediate
ResidentialBS-8233PASS
Baby Nursery — BS 8233 Sleep Environment
5m × 2.5m × 2mRT60 = 0.38s
Target: 0.25–0.4sIntermediate
ResidentialBS-8233MARGINAL
Penthouse Living Space — BS 8233 Luxury Residential
10m × 10m × 2mRT60 = 0.61s
Target: 0.4–0.6sIntermediate
ResidentialNBR-15575FAIL
Apartment Bathroom — NBR 15575 Acoustic Reality
3m × 2m × 2mRT60 = 1.14s
Target: 0.3–0.6sIntermediate
ResidentialBB93FAIL
Student Housing Room — BB93/Part E Compliance
3m × 3m × 2mRT60 = 0.61s
Target: 0.3–0.5sIntermediate
ResidentialBS-8233MARGINAL
Townhouse Stairwell — BS 8233 Flutter Echo Control
2m × 2.5m × 6mRT60 = 0.82s
Target: 0.4–0.8sIntermediate
ResidentialBS-8233MARGINAL
Loft Conversion — BS 8233 Part E Compliance
8m × 5m × 2mRT60 = 0.52s
Target: 0.3–0.5sIntermediate
ResidentialISO-3382MARGINAL
Garden Room Studio — Best Practice Home Recording
5m × 2.5m × 2mRT60 = 0.18s
Target: 0.2–0.4sIntermediate
Explore More
Room Type Guides
Acoustic design guides for 12 room types with RT60 targets.
Compliance Guides
Room + standard intersection guides with step-by-step compliance.
RT60 Calculator
Model your own room and calculate reverberation time online.
Materials Database
5,000+ acoustic materials with absorption coefficients.
All calculations are advisory and based on the Sabine equation (ISO 3382-2:2008 Annex A). Results require professional verification for compliance submissions. Absorption coefficients are sourced from manufacturer datasheets and ISO 354 test reports.