1. Describe the complaint
Write down what you hear, when it happens, where it is loudest and whether it is speech, music, bass, footsteps, machinery, plumbing, traffic or echo.
2. Separate isolation from treatment
These solve different problems.
3. Trace every path
Inspect doors, windows, vents, outlets, ceilings, floors, shared cavities and connected framing.
4. Set a measurable goal
Examples include speech privacy, clearer calls, fewer footstep peaks or lower night traffic noise.
5. Check rules and hazards
Confirm permissions, building and fire requirements, ventilation, electrical work and hazardous-material risks.
6. Compare complete proposals
Use the comparison sheet to record systems, evidence, cost and unresolved paths.
Best first investment: a careful diagnosis.