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Difference between revisions of "TL Tool - Sound Transmission Loss Measurement"
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TL Tool - Sound Transmission Loss Measurement (view source)
Revision as of 16:51, 22 May 2026
, 22 MayReverted edits by Lmagimel (talk) to last revision by LaurentM OROS
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m (Reverted edits by Lmagimel (talk) to last revision by LaurentM OROS) Tags: Rollback Reverted |
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__TOC__ | __TOC__ | ||
[[File:TL_Tool_icon.png|right|180px|TL Tool|link=]] | |||
<div style="background:linear-gradient(120deg,#001F5B 0%,#0055A5 100%);color:white;padding:22px 28px;border-radius:10px;margin-bottom:18px;"> | <div style="background:linear-gradient(120deg,#001F5B 0%,#0055A5 100%);color:white;padding:22px 28px;border-radius:10px;margin-bottom:18px;"> | ||
<span style="font-size:1.5em;font-weight:bold;">TL Tool — Sound Transmission Loss</span><br/><br/> | <span style="font-size:1.5em;font-weight:bold;">TL Tool — Sound Transmission Loss</span><br/><br/> | ||
Standalone application for measuring the <b>Sound Transmission Loss (TL)</b> and <b>sound absorption coefficient (α)</b> of acoustic materials using a 4-microphone impedance tube.<br/><br/> | |||
Fully integrated with <b>OROS NVGate</b> for live acquisition and automatic result display — delivered as a plug-and-play <b>.exe</b>, no installation required. | |||
</div> | </div> | ||
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! style="background:#0055A5;color:white;" | Value | ! style="background:#0055A5;color:white;" | Value | ||
|- | |- | ||
| '''Delivery''' || | | '''Delivery''' || Standalone .exe — no Python, no installation | ||
|- | |- | ||
| '''Measurement methods''' || 4-mic transfer matrix (ASTM E2611) • 2-mic standing wave (ISO 10534-2) | | '''Measurement methods''' || 4-mic transfer matrix (ASTM E2611) • 2-mic standing wave (ISO 10534-2) | ||
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|- | |- | ||
| '''Export''' || CSV (frequency, TL, α) | | '''Export''' || CSV (frequency, TL, α) | ||
|- | |||
| '''Startup time''' || ~3 seconds | |||
|} | |} | ||
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|} | |} | ||
== Troubleshooting == | |||
{| class="wikitable" style="width:100%;" | |||
! style="background:#6c1a1a;color:white;width:28%;" | Symptom | |||
! style="background:#6c1a1a;color:white;width:36%;" | Likely cause | |||
! style="background:#6c1a1a;color:white;" | Solution | |||
|- | |||
| NVGate not connected || Analyzer off or Ethernet disconnected || Check Ethernet cable and NVGate status | |||
|- | |||
| Missing FRF data || Channels not configured || Click <b>Configure NVGate</b>, then re-run | |||
|- | |||
| TL values all zero or NaN || Incorrect tube geometry || Check x1–x4 positions and tube diameter | |||
|- | |||
| Negative TL values || No phase calibration || Run phase calibration in Acquisition tab | |||
|- | |||
| Frequency range too narrow || Microphone spacing too small || Increase x2−x1 or x4−x3 spacing | |||
|- | |||
| NVGate wrong octave resolution || Previous window reused || Fixed: each resolution uses a dedicated window | |||
|} | |||
== See Also == | == See Also == | ||
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* ISO 9613-1 — ''Attenuation of sound during propagation outdoors — Calculation of the absorption of sound by the atmosphere'' | * ISO 9613-1 — ''Attenuation of sound during propagation outdoors — Calculation of the absorption of sound by the atmosphere'' | ||
* ISO 11654 — ''Sound absorbers for use in buildings — Rating of sound absorption'' | * ISO 11654 — ''Sound absorbers for use in buildings — Rating of sound absorption'' | ||
* [https://www.bksv.com/media/doc/bv0059.pdf Brüel & Kjær BV0059 — Measuring Sound Absorption Coefficient] | |||
* Miki Y. (1990) — ''Acoustical properties of porous materials — modifications of Delany-Bazley models'' | * Miki Y. (1990) — ''Acoustical properties of porous materials — modifications of Delany-Bazley models'' | ||