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<table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top"> <td width="10"> </td> <td><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top"> <td width="562"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="contentheader">HEAD News - Bereich Telecom</td> <td class="contentheader" align="right" width="250">Herzogenrath, 15.12.2009</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="12"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="contentheader">Neue ACOPTs seit ACQUA 2.4.200</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="12"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Mit der neuen Version 2.4.200 des <img src="../images/arrow.gif" width="9" height="7"> <a href="telecom_acqua.htm" class="fliess_ohne_justify">Analysesystems ACQUA</a> sind drei neue <img src="../images/arrow.gif" width="9" height="7"> <a href="telecom_acqua_acopt.htm" class="fliess_ohne_justify">ACOPTs (ACQUA-Optionen)</a> für psychoakustische Analysen (Lautheit/Schärfe/ Rauigkeit), raumakustische Messungen (basierend auf MLS-Signalen) und STI-Berechnungen (Speech Transmission Index, STITEL/STIPA/ RASTI) verfügbar geworden. Die Hauptmerkmale der <img src="../images/arrow.gif" width="9" height="7"> <a href="telecom_acqua_acopt.htm" class="fliess_ohne_justify">neuen ACOPTs</a> sind im Folgenden beschrieben. Detailliertere Informationen zu den neuen Analysen, Messungen und Berechnungen mit ACOPT 25/26/27 sind im ACQUA Hilfesystem zu finden.</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="20"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="contentheader">ACOPT 25 - Option Psychoacoustic SMDs</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top" class="fliess_ohne_justify"> <td><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Die subjektive Beurteilung von Schallereignissen entspricht nicht immer den durch herkömmliche Mess- und Analyseverfahren ermittelten Werten. Ob ein Schallereignis als wohlklingend oder störend empfunden wird, hängt oft vom subjek- tiven Eindruck der Testperson ab. </td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Die Psychoakustik beschäftigt sich mit der Erforschung von Methoden der Signal-Analyse, deren Ergebnisse in linearem Zusammenhang mit subjektiv empfundenen Klang-Beurteilungen stehen. </td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Zu den Parametern, die das Hörempfinden beeinflussen, zählen unter anderem die Größen Lautheit, Schärfe und Rauigkeit. </td> </tr> </table></td> <td width="16"> </td> <td width="273"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">ACOPT 25 bietet Messkarten (SMDs) zur Durchführung verschiedener psychoakustischer Analysen. Die SMD-Analysen sind auch im ACQUAlyzer verfügbar.</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify"><p>Wählbare Analysemethoden:</p></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Loudness vs. Time</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Spec. Loudness</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Spec. Loudness vs. Time</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Sharpness vs. Time</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Roughness vs. Time (Hearing Model)</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Spec. Roughness (Hearing Model)</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Spec. Roughness vs. Time (Hearing Model)</strong></td> </tr> </table></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="20"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="contentheader">ACOPT 26 - Option Roomacoustics</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top" class="fliess_ohne_justify"> <td><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Bei der Analyse heutiger akustischer Systeme (Räume, Testlabor, Fahrzeugkabine, etc.), ist deren gemessene Impulsantwort eine gut geeignete Darstellung zur Bestimmung von Charakteristiken oder zur Untersuchung von Problemen.</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">HEAD acoustics bietet die Option ACOPT 26 zur Messung von (räumlichen) Impulsantworten, Nachhallzeit (auch über Frequenzbänder), Zerfallsspektren und anderer akustischer Parameter gemäß DIN EN ISO 3382: 2000-3.</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Die Impulsantwort eines Systems kann durch Verwendung eines MLS-Signals (MLS = maximale Längensequenz) gemessen werden. </td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Die Systemantwort kann aufgenommen und durch die Hadamard Transformation verarbeitet werden, die von der Struktur des MLS-Quell- signals profitiert.</td> </tr> </table></td> <td width="16"> </td> <td width="273"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify"><p>Hauptmerkmale:</p></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Impulsantwort</strong> (mit MLS-Signalen)</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Nachhallzeit vs. Bänder</strong> (Oktav, 3./ 6./12. Oktav)</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Kumulatives Zerfallsspektrum</strong></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Einzelwerte gemäß DIN EN ISO 3382:</strong> <br> - Nachhallzeit RT30, RT60 <br> - Früher Nachhall EDT <br> - Klarheitsmaß C50, C80 <br> - Deutlichkeit D50, D80 <br> - Schwerpunktzeit T<sub>s</sub></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>EEB (Early Energy Balance) gemäß ITU-T P.340:</strong> repräsentiert in objektiver Weise den subjektiven Eindruck des Nachhalls</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify"><p>Wählbare Analysemethoden:</p></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Impulse Response</strong> (MLS)</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Decay vs. Bands</strong> (MLS)</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="4"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr class="fliess_ohne_justify"> <td width="5" valign="top"><img src="../images/dot.gif" width="5" height="12"></td> <td width="5"><img src="../images/shim.gif" width="5" height="8"></td> <td valign="top" class="fliess_ohne_justify"><strong>Cumulative Spectral Decay</strong> (MLS)</td> </tr> </table></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="20"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="contentheader">ACOPT 27 - Option STI/RASTI</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Der Sprachübertragungsindex (Speech Transmission Index, STI) ist ein Maß zur Beurteilung der Sprachverständlichkeit. Diese nimmt durch die Übertragungswege (Rauschen, Verzerrung) und Wiedergabe im Raum (Echos, Hintergrundgeräusche) in der Regel ab. </td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Der STI basiert auf der Messung von Modulationsgraden der Intensitäts-Einhüllenden von Signalen. Dabei werden der spektrale Bereich der Sprache (125Hz - 8kHz) und die bei Sprache auftretenden Modulationsfrequenzen (0,63 Hz - 12,5 Hz) berücksichtigt. Der Modulationsgrad nimmt durch Störungen der Sprachübertragung ab. </td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="8"></td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="fliess_ohne_justify">Bei der vollständigen Bestimmung des STI werden alle Modulationsgrade im Terzabstand in allen Oktaven des Sprachbereichs bestimmt, was 7 (Oktaven) mal 14 (Modulations-Frequenzen) Messpunkte ergibt. STITEL, STIPA und RASTI sind vereinfachte Messverfahren des STI. <br> Sie erlauben es, mittels einer einzigen Messung den STI zu bestimmen.</td> </tr> </table> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../images/shim.gif" width="10" height="12"></td> </tr> </table></td> <td> </td> </tr> </table></td> <td width="10"> </td> </tr> </table><p>Ihr Browser kann leider keine eingebetteten Frames anzeigen: Sie können die eingebettete Seite über den folgenden Verweis aufrufen: <a href="i-news_telecom_15_12_09.htm" target="_blank">Inhalt</a></p>
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