TL Tool - Sound Transmission Loss Measurement - Revision history

LaurentM OROS: Replace chart placeholders with real GUI screenshots (3 captures)

2026-05-27T09:34:03Z

Replace chart placeholders with real GUI screenshots (3 captures)

← Older revision		Revision as of 11:34, 27 May 2026
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	[[File:~~TL_Tool_result_fineband~~.png\|center\|700px\|TL ~~Result~~ tab — fine ~~band~~ (~~blue~~) ~~and~~ 1/12 octave ~~bars (orange)~~]]		[[File:TL_Tool_GUI_transmission_loss.png\|center\|700px\|TL Tool — Transmission Loss tab : bande fine (FFT) et barres 1/12 octave]]
	=== Absorption Tab ===		=== Absorption Tab ===

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	[[File:~~TL_Tool_result_demo~~.png\|center\|700px\|TL ~~(left) and~~ absorption ~~coefficient (right) — demo measurement on 3 kg/m² mass law sample~~]]		[[File:TL_Tool_GUI_rating_iso11654.png\|center\|700px\|TL Tool — onglet Rating ISO 11654 : classement A–E du coefficient d'absorption]]
	=== CSV Export ===		=== CSV Export ===

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	→ See the [[TL_Tool_-_Acoustic_Formulas_Reference\|Formulas Reference]] for full DBM equations.		→ See the [[TL_Tool_-_Acoustic_Formulas_Reference\|Formulas Reference]] for full DBM equations.
	</div>		</div>


			[[File:TL_Tool_GUI_propagation.png\|center\|700px\|TL Tool — onglet Propagation : nombre d'onde, atténuation, impédance caractéristique]]

	== Multi-Tube Merge ==		== Multi-Tube Merge ==

LaurentM OROS: Add 5 screenshot(s): Tube Setup, 2-mic mode, TL Result Tab, Absorption Tab, Multi-Tube Merge

2026-05-27T09:17:52Z

Add 5 screenshot(s): Tube Setup, 2-mic mode, TL Result Tab, Absorption Tab, Multi-Tube Merge

← Older revision		Revision as of 11:17, 27 May 2026
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	</pre>		</pre>


			[[File:TL_Tool_tube_4mic_100mm.png\|center\|480px\|Tube d'impedance 4 microphones — Ø100 mm default configuration]]
	* '''SP''' — Sound source (loudspeaker)		* '''SP''' — Sound source (loudspeaker)
	* '''x1, x2''' — Upstream microphones (source side)		* '''x1, x2''' — Upstream microphones (source side)
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	* Reflection coefficient R(f) from standing wave decomposition		* Reflection coefficient R(f) from standing wave decomposition
	* Absorption coefficient α(f) = 1 − \|R\|²		* Absorption coefficient α(f) = 1 − \|R\|²

			[[File:TL_Tool_tube_2mic.png\|center\|480px\|Tube configuration for 2-microphone mode (ISO 10534-2)]]

	== Step-by-Step Measurement Procedure ==		== Step-by-Step Measurement Procedure ==
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	\|}		\|}


			[[File:TL_Tool_result_fineband.png\|center\|700px\|TL Result tab — fine band (blue) and 1/12 octave bars (orange)]]
	=== Absorption Tab ===		=== Absorption Tab ===

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	\|}		\|}


			[[File:TL_Tool_result_demo.png\|center\|700px\|TL (left) and absorption coefficient (right) — demo measurement on 3 kg/m² mass law sample]]
	=== CSV Export ===		=== CSV Export ===

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	The blend zone [f_blend_lo, f_blend_hi] uses a cosine cross-fade, ensuring a smooth transition.		The blend zone [f_blend_lo, f_blend_hi] uses a cosine cross-fade, ensuring a smooth transition.


			[[File:TL_Tool_tube_4mic_29mm.png\|center\|400px\|Small-diameter tube (Ø29 mm) for high-frequency measurements]]
	== Configuration ==		== Configuration ==

Lmagimel: Undo revision 12916 by Lmagimel (talk)

2026-05-22T14:54:24Z

Undo revision 12916 by Lmagimel (talk)

← Older revision		Revision as of 16:54, 22 May 2026
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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''' \|\| ~~Standalone~~ .~~exe — no Python, no installation~~		\| '''Delivery''' \|\| [https://partnerzone.digigram.com/s/QjZaMrTZCrDQTJa download here] version from 22/05/2026 - Beta version - download at your own risk !
	\|-		\|-
	\| '''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''

Lmagimel: Reverted edits by Lmagimel (talk) to last revision by LaurentM OROS

2026-05-22T14:54:01Z

Reverted edits by Lmagimel (talk) to last revision by LaurentM OROS

@@ Line 328: / Line 328: @@
 |-
 | Phase calibration || (none) || Path to .npz calibration file
 |}
@@ Line 344: / Line 364: @@
 * ISO 9613-1 &mdash; ''Attenuation of sound during propagation outdoors &mdash; Calculation of the absorption of sound by the atmosphere''
 * ISO 11654 &mdash; ''Sound absorbers for use in buildings &mdash; Rating of sound absorption''
 * Miki Y. (1990) &mdash; ''Acoustical properties of porous materials &mdash; modifications of Delany-Bazley models''

Lmagimel: /* References */

2026-05-22T14:52:51Z

References

← Older revision		Revision as of 16:52, 22 May 2026
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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''

Lmagimel: /* Troubleshooting */

2026-05-22T14:52:27Z

Troubleshooting

@@ Line 328: / Line 328: @@
 |-
 | Phase calibration || (none) || Path to .npz calibration file
 |}

Lmagimel: Reverted edits by Lmagimel (talk) to last revision by LaurentM OROS

2026-05-22T14:51:45Z

Reverted edits by Lmagimel (talk) to last revision by LaurentM OROS

← Older revision		Revision as of 16:51, 22 May 2026
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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''' \|\| ~~[https://partnerzone~~.~~digigram.com/s/QjZaMrTZCrDQTJa download here] version from 22/05/2026 - Beta version - download at your own risk !~~		\| '''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''

Lmagimel at 14:45, 22 May 2026

2026-05-22T14:45:16Z

@@ Line 30: / Line 30: @@
 |-
 | '''Export''' || CSV (frequency, TL, &alpha;)
 |}
@@ Line 327: / Line 325: @@
 |}
 == See Also ==

Lmagimel at 14:44, 22 May 2026

2026-05-22T14:44:32Z

← Older revision		Revision as of 16:44, 22 May 2026
Line 19:		Line 19:
	! style="background:#0055A5;color:white;" \| Value		! style="background:#0055A5;color:white;" \| Value
	\|-		\|-
	\| '''Delivery''' \|\| [https://partnerzone.digigram.com/s/~~WRegstSrprmaZie~~ download here] version from 22/05/2026 - Beta version - download at your own risk !		\| '''Delivery''' \|\| [https://partnerzone.digigram.com/s/QjZaMrTZCrDQTJa download here] version from 22/05/2026 - Beta version - download at your own risk !
	\|-		\|-
	\| '''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)

Lmagimel: /* References */

2026-05-22T14:08:12Z

References

← Older revision		Revision as of 16:08, 22 May 2026
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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''