Appendix

Assumptions & Limitations

Every prediction in this study depends on these assumptions being met. This page is the definitive reference for what can be customized and what must remain unchanged.

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Professional Notice

Performance Responsibility

Conditions for Predicted Performance

Exclusions

Basis of Design

Design Assumptions

Acoustic predictions depend on these conditions. If any assumption does not hold during construction, the affected predictions should be re-evaluated.

Wall Performance

Field STC Estimates

Laboratory STC ratings assume ideal test conditions. Installed (field) performance is typically 3–7 points lower. These estimates account for real-world construction conditions.

Engineering Advisory

Wall	Name	Lab STC	Est. Field STC	Note

Critical Notes

Engineering Advisories

These field-proven practices directly affect acoustic performance. Ignoring any of these advisories may void the performance predictions in this study.

What You Can Change

Modification Policy

[AC] Acoustic Critical

Do not modify without acoustic consultant approval.

[DEC] Decorative

Can be customized per client/contractor preference.

Isolation Scope

Normal Production Levels

Isolation predictions in this study assume these “normal production levels.” Performance at higher levels is not guaranteed.

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