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The Future of Acoustic modeling
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<blockquote data-quote="Brad Weber" data-source="post: 72937" data-attributes="member: 114"><p>Re: The Future of Acoustic modeling</p><p></p><p></p><p>I know ETC and NWAA do typically provide the data in multiple formats. Also note that there are actually two versions of CLF data, CLF 1 with 10 degree and one octave resolution and CLF 2 with 5 degree and one-third octave resolution, the latter is more common and more directly comparable to EASE data files.</p><p></p><p>It is important to understand that the SPK and CLF formats look at a loudspeaker or array as a single entity while the GLL format allows looking at the individual drivers as separate sources and the enclosure as a physical thing as well as including the effects of filters and delays. For example, say you have a two-way box with a rotatable horn and you want to look at it modeled with it rotated. With CLF and SPK files you either had to have a separate file for the box with the horn rotated or you simply rotate the entire box in your model, which is not really the same as rotating just the horn. With a full GLL file one could potentially rotate just the HF horn and see not just the HF pattern rotate but also how the interactions with the LF driver change, which you could then further modify by changing the crossover or adding delay and seeing the predicted results of those changes.</p><p></p><p>Since SPK and CLF files look at a speaker as a single entity they do not include all the data required for that functionality and thus I don't believe you can convert from SPK or CLF to GLL. However, I believe that with the Pro version of SpeakerLab it is possible to export the results of a GLL speaker as SPK or CLF files or as tabular data.</p></blockquote><p></p>
[QUOTE="Brad Weber, post: 72937, member: 114"] Re: The Future of Acoustic modeling I know ETC and NWAA do typically provide the data in multiple formats. Also note that there are actually two versions of CLF data, CLF 1 with 10 degree and one octave resolution and CLF 2 with 5 degree and one-third octave resolution, the latter is more common and more directly comparable to EASE data files. It is important to understand that the SPK and CLF formats look at a loudspeaker or array as a single entity while the GLL format allows looking at the individual drivers as separate sources and the enclosure as a physical thing as well as including the effects of filters and delays. For example, say you have a two-way box with a rotatable horn and you want to look at it modeled with it rotated. With CLF and SPK files you either had to have a separate file for the box with the horn rotated or you simply rotate the entire box in your model, which is not really the same as rotating just the horn. With a full GLL file one could potentially rotate just the HF horn and see not just the HF pattern rotate but also how the interactions with the LF driver change, which you could then further modify by changing the crossover or adding delay and seeing the predicted results of those changes. Since SPK and CLF files look at a speaker as a single entity they do not include all the data required for that functionality and thus I don't believe you can convert from SPK or CLF to GLL. However, I believe that with the Pro version of SpeakerLab it is possible to export the results of a GLL speaker as SPK or CLF files or as tabular data. [/QUOTE]
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