Introduction
AACG provides floor impact sound assessments and testing for residential and mixed-use developments across Australia.
Services cover:
- Pre-installation design assessment
- Post-installation acoustic testing
- Strata acoustic compliance (NSW)
- Body corporate acoustic compliance (QLD)
We deliver measurable, compliant, and defensible acoustic outcomes aligned with NCC requirements and real-world building performance.
When You Need Impact Sound Assessment or Testing
Impact sound assessment or testing is required where:
- Multi-residential developments require NCC acoustic compliance
- Floor systems must be designed to meet impact sound insulation targets
- A strata acoustic compliance issue has been raised (NSW)
- A body corporate acoustic complaint requires investigation (QLD)
- Post-construction verification is required for certification or dispute resolution
This commonly applies to:
- Apartments and multi-residential buildings
- Mixed-use developments
- Refurbishments involving floor finishes
Impact Sound Requirements (NCC)
Impact sound transmission is regulated under the NCC for separating floor systems.
Compliance typically requires:
- Achieving defined impact sound insulation performance (Ln,w)
- Limiting transmission of footfall and structure-borne noise
- Demonstrating compliance through design or field testing
Performance depends on:
- Floor construction type
- Floor coverings and underlay systems
- Ceiling systems below
- Installation quality
Pre-Installation Assessment (Design Phase)
AACG provides design-phase assessments to define compliant floor systems before construction.
This includes:
- Review of architectural and structural drawings
- Assessment of proposed floor-ceiling systems
- Identification of required acoustic treatments
- Selection of compliant floor finishes and underlays
Outputs include:
- Defined floor system build-ups
- Performance targets
- Coordination with project documentation
This reduces:
- Risk of non-compliance
- Costly redesign
- Post-construction failures
Post-Installation Testing (Verification)
AACG undertakes field testing to verify installed floor performance.
Testing includes:
- Measurement of impact sound transmission using standardised methods
- Determination of Ln,w performance
- Identification of compliance with NCC requirements
Where issues are identified, AACG provides:
- Diagnostic assessment of failure causes
- Recommendations for rectification
- Support for compliance resolution
Strata Acoustic Compliance (NSW)
AACG provides assessments for strata acoustic compliance in New South Wales.
This includes:
- Investigation of impact noise complaints between units
- Verification of floor system performance
- Assessment of modifications (e.g. hard flooring installations)
Reports are suitable for:
- Strata managers
- Owners corporations
- Legal or dispute resolution processes
Outputs are:
- Measured performance results
- Clear compliance position
- Defendable technical documentation
Body Corporate Acoustic Compliance (QLD)
AACG provides assessments for body corporate acoustic compliance in Queensland.
This includes:
- Investigation of impact noise transmission between lots
- Assessment of floor coverings and building systems
- Verification against applicable acoustic performance expectations
Reports support:
- Body corporate decision-making
- Dispute resolution
- Compliance verification
Testing Methodology
AACG testing is undertaken in accordance with:
Testing involves:
- Standardised impact sources (tapping machine)
- Measurement within receiving rooms
- Analysis of sound transmission characteristics
Results are reported as:
- Weighted impact sound levels (Ln,w)
- Compliance against applicable criteria
Common Performance Issues
Impact sound failures commonly result from:
- Inadequate acoustic underlay systems
- Incorrect installation of floor finishes
- Flanking transmission paths
- Lightweight construction without sufficient treatment
AACG identifies these issues and defines practical solutions.
Our Reports
AACG impact sound reports are:
- Prepared for NCC compliance and certification
- Suitable for strata and body corporate use
- Structured for clear technical interpretation
Each report includes:
- Site-specific testing or assessment
- Measured or predicted performance
- Compliance assessment
- Practical recommendations
Our Process
AACG applies a structured approach:
- Review of project or complaint context
- Identification of applicable compliance requirements
- Assessment or testing of floor systems
- Analysis of results
- Development of clear recommendations
Outputs are:
- Defendable
- Practical
- Suitable for implementation
Our Quality
AACG reports are defined by:
- Accurate field testing and analysis
- Alignment with recognised standards
- Consistent documentation structure
- Focus on compliance outcomes
Each assessment is controlled and site-specific.
Our Commercial Approach
Impact sound issues can result in:
- Costly rectification works
- Project delays
- Disputes between occupants
AACG ensures:
- Risks are identified early (design phase)
- Failures are diagnosed clearly (post-construction)
- Solutions are practical and targeted
This reduces unnecessary cost and supports resolution.
Our Guarantees
AACG provides:
- Clear and defendable compliance outcomes
- Consistent, professional reporting
- Support for both design and post-construction phases
We also provide:
- Coordination with builders and consultants
- Support for strata and body corporate matters
- Ongoing advice where rectification is required
Request a Floor Impact Sound Assessment or Test
AACG will:
- Review your project or compliance issue
- Identify required assessment or testing scope
- Provide a clear pathway to compliance
