Calculating modes for multiple frequencies

[John-Ragland]

Do you know if there is a way to run kraken for multiple frequencies (without just using a forloop and calling kraken.exe over and over again)? There seems to be hints that this feature exists throughout kraken, but I haven't found any direct answer in the documentation. For instance the shade file has a dimension for different frequencies that always seems to be size 1.

This isn't strictly a pyat question, but thought you might know.

Thanks

[hunterakins]

Yes, although pyat doesn't have support for that. See that broadband example in the Acoustics Toolbox (under the tests folder). The MunkK.env file theere shows an example where there are 2 frequencies specified. It would be easy to implement in pyat, and in a way that is backwards compatible (check if input frequency to write env is a list or a float/int, then write it in the appropriate way). What's the problem with the forloop? Too slow?

[emma-ozanich]

Hi guys, So it seems like the broadband method is only valid for range-independent cases? It errors when I try to run Krakenc with a range-dependent profile. Any thoughts? And same, looping is just kind of slow. By the way, I created a function to copy an env file and just replace the frequency, which will save you a fair amount of write time. -Emma

[hunterakins]

Emma, Haven't messed around much with the broadband method. There may be a way to get it to work for range-dependent, but I don't know it. With regard to cutting down loop time, is reading and writing env files the main bottleneck? If so, there is a general way to speed it up using memory mapped files in reading and writing that I have considered implementing but haven't tried yet.