Confirm the System Type and Original Complaint

Record whether the enclosure is sealed, ported, uses a passive radiator, has pressure equalization, or contains separate chambers. Reproduce the complaint using the track, tone, sweep, level, orientation, temperature state, and battery or supply condition in which it was found.

The portable-speaker bass article provides context for separating a leak from tuning, limiter, driver, or room effects.

Create a Leak-Path Map

Use drawings and teardown knowledge to mark every intended and unintended path. Include hidden screw holes, wire feedthroughs, foam interfaces, welds, adhesive joints, insert areas, and partitions between chambers.

Use a Controlled Signal and Safe Level

Low-frequency discrete tones or a slow sweep can expose air movement and panel vibration. Begin at low level and increase under a safe test instruction. Record frequency and onset. Stop for bottoming, unstable radiator excursion, severe distortion, overheating, or mechanical contact.

Do not use uncontrolled pressure, liquid, smoke, or chemicals inside an electronic product. Any pressure-decay or tracer method must be validated for the enclosure, intentional vents, driver compliance, and safety.

Localize Without Creating a False Fix

Listen and measure around each mapped path. Engineering may use temporary non-damaging isolation to see whether the artifact changes, but document what was covered and remove it before final testing. Gentle contact can help locate a vibrating panel yet may also alter a gasket, so treat it as diagnostic evidence only.

Inspect Geometry, Gasket, and Assembly Evidence

Disassemble through an approved process. Inspect gasket continuity, overlap, compression set, wrinkles, adhesive, contamination, surface flatness, driver frame, screw sequence, torque records, boss damage, weld or bond, cable seal, and panel alignment. Keep photographs before cleaning or repair.

The common production-problems article helps define containment when the failure is tied to a lot, cavity, station, or material.

Correct the Cause and Retest the Complete Product

Possible corrections include gasket die-cut or placement, compression stop, surface flatness, screw pattern, torque sequence, adhesive process, weld, cable seal, panel datum, tooling, or inspection. Extra glue on one sample is not a production correction unless material, location, amount, cure, and service effect are controlled.

Retest the original failure condition, frequency response, output, passive-radiator motion, buzz/rattle, exposure requirement where relevant, charging, controls, and service closure. Compare several production-intent units.

Turn the Finding into a Production Control

Choose controls capable of detecting the actual failure: gasket vision, part flatness, adhesive dispense monitoring, screw program, pressure or acoustic leak test, reference sweep, unit weight, or targeted functional inspection. Validate false-pass and false-fail behavior.

The repeat-order sound-consistency guide can carry leak-sensitive reference data across suppliers and orders. Review tooling, cost, lead time, packaging, warranty, and service for any correction.

Cabinet Leak Closure Record

• Acoustic architecture, intended vents, chambers, sample, signal, level, orientation, and power state are defined.
• Drivers, radiators, ports, seams, panels, covers, buttons, windows, screws, and cables are mapped.
• Frequency and level onset, location, motion, sound, and reference-unit difference are recorded.
• Diagnostic isolation is safe, temporary, documented, and removed before release testing.
• Teardown preserves gasket, flatness, torque, adhesive, weld, cable, boss, and alignment evidence.
• The correction changes a controlled drawing, material, tool, process, firmware, or inspection.
• Complete units repeat acoustic, mechanical, environmental, and functional checks.
• Production detection is validated against known leak and non-leak samples.

References

• International Electrotechnical Commission, IEC 60268-21:2018 — acoustical output-based measurements.