PRIVACY & LIMITATIONS

Enclosure parameters stay local. No audio is read.

Net volume, tuning, temperature, vent dimensions, driver area, excursion, and check frequency are used only for ideal Helmholtz and airflow estimates on the current page. PortTune requests no microphone, plays or uploads no audio, and connects to no measurement hardware or simulation software.

Ideal acoustic estimate, not enclosure approval

The tool uses a single-chamber ideal Helmholtz model, user-supplied end correction, and temperature-linear sound speed to calculate physical/effective length, displacement, half-wave pipe resonance, and air speed from peak sinusoidal excursion. It does not model driver T/S parameters, box/vent losses, laminar/turbulent flow, compression, flares, folded slots, boundary loading, fill, enclosure modes, leaks, passive radiators, room gain, filters, distortion, thermal compression, or structural strength.

Design sheets may contain unreleased dimensions

Refreshing or closing discards inputs. CSV contains volume, Fb, sound speed, vent area/length/displacement, pipe resonance, velocity, and Mach; reports and optional local checkpoints read the visible summary. Net volume must exclude the driver, bracing, and vent, and the finished enclosure must be calibrated by impedance measurement and stepped low-level testing.

Advertising and local preferences

This page uses Google AdSense Auto Ads. Google may use cookies or similar technologies under its policies. .miluland.com domain cookies sync language, theme, high contrast, a six-item recent-tools list, and up to 16 favorite tool IDs across MiluLand sites. These values never contain inputs, files, or results; the current site also keeps a local compatibility copy.

Local report studio

The report studio reads only the workbench’s currently visible result summary for local preview, Markdown copy, JSON download, printing, and a SHA-256 fingerprint. It never reads input controls or original files and is not persisted unless you choose to download it.

Optional local checkpoints

Only when you explicitly choose Save does the tool write the visible result summary, time, and optional short label to this site’s browser storage, up to five entries. Imported files and input-control contents are never stored; you can export, restore same-tool checkpoints, or clear them at any time. Imports are limited to 128KB and validate the tool, timestamp, summary, and label of up to 80 characters.