- <title>Når nynorskoversettelsen svikter til eksamen...</title>
- <link>http://people.skolelinux.org/pere/blog/N_r_nynorskoversettelsen_svikter_til_eksamen___.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/N_r_nynorskoversettelsen_svikter_til_eksamen___.html</guid>
- <pubDate>Sat, 3 Jun 2017 08:20:00 +0200</pubDate>
- <description><p><a href="http://www.aftenposten.no/norge/Krever-at-elever-ma-fa-annullert-eksamen-etter-rot-med-oppgavetekster-622459b.html">Aftenposten
-melder i dag</a> om feil i eksamensoppgavene for eksamen i politikk og
-menneskerettigheter, der teksten i bokmåls og nynorskutgaven ikke var
-like. Oppgaveteksten er gjengitt i artikkelen, og jeg ble nysgjerring
-på om den fri oversetterløsningen
-<a href="https://www.apertium.org/">Apertium</a> ville gjort en bedre
-jobb enn Utdanningsdirektoratet. Det kan se slik ut.</p>
-
-<p>Her er bokmålsoppgaven fra eksamenen:</p>
-
-<blockquote>
-<p>Drøft utfordringene knyttet til nasjonalstatenes og andre aktørers
-rolle og muligheter til å håndtere internasjonale utfordringer, som
-for eksempel flykningekrisen.</p>
-
-<p>Vedlegge er eksempler på tekster som kan gi relevante perspektiver
-på temaet:</p>
-<ol>
-<li>Flykningeregnskapet 2016, UNHCR og IDMC
-<li>«Grenseløst Europa for fall» A-Magasinet, 26. november 2015
-</ol>
-
-</blockquote>
-
-<p>Dette oversetter Apertium slik:</p>
-
-<blockquote>
-<p>Drøft utfordringane knytte til nasjonalstatane sine og rolla til
-andre aktørar og høve til å handtera internasjonale utfordringar, som
-til dømes *flykningekrisen.</p>
-
-<p>Vedleggja er døme på tekster som kan gje relevante perspektiv på
-temaet:</p>
-
-<ol>
-<li>*Flykningeregnskapet 2016, *UNHCR og *IDMC</li>
-<li>«*Grenseløst Europa for fall» A-Magasinet, 26. november 2015</li>
-</ol>
-
-</blockquote>
-
-<p>Ord som ikke ble forstått er markert med stjerne (*), og trenger
-ekstra språksjekk. Men ingen ord er forsvunnet, slik det var i
-oppgaven elevene fikk presentert på eksamen. Jeg mistenker dog at
-"andre aktørers rolle og muligheter til ..." burde vært oversatt til
-"rolla til andre aktørar og deira høve til ..." eller noe slikt, men
-det er kanskje flisespikking. Det understreker vel bare at det alltid
-trengs korrekturlesning etter automatisk oversettelse.</p>
+ <title>Measuring the speaker frequency response using the AUDMES free software GUI - nice free software</title>
+ <link>http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html</guid>
+ <pubDate>Mon, 22 Oct 2018 08:40:00 +0200</pubDate>
+ <description><p><img src="http://people.skolelinux.org/pere/blog/images/2018-10-22-audmes-measure-speakers.png" align="right" width="40%"/></p>
+
+<p>My current home stereo is a patchwork of various pieces I got on
+flee markeds over the years. It is amazing what kind of equipment
+show up there. I've been wondering for a while if it was possible to
+measure how well this equipment is working together, and decided to
+see how far I could get using free software. After trawling the web I
+came across an article from DIY Audio and Video on
+<a href="https://www.diyaudioandvideo.com/Tutorial/SpeakerResponseTesting/">Speaker
+Testing and Analysis</a> describing how to test speakers, and it listing
+several software options, among them
+<a href="https://sourceforge.net/projects/audmes/">AUDio MEasurement
+System (AUDMES)</a>. It is the only free software system I could find
+focusing on measuring speakers and audio frequency response. In the
+process I also found an interesting article from NOVO on
+<a href="http://novo.press/understanding-speaker-specifications-and-frequency-response/">Understanding
+Speaker Specifications and Frequency Response</a> and an article from
+ecoustics on
+<a href="https://www.ecoustics.com/articles/understanding-speaker-frequency-response/">Understanding
+Speaker Frequency Response</a>, with a lot of information on what to
+look for and how to interpret the graphs. Armed with this knowledge,
+I set out to measure the state of my speakers.</p>
+
+<p>The first hurdle was that AUDMES hadn't seen a commit for 10 years
+and did not build with current compilers and libraries. I got in
+touch with its author, who no longer was spending time on the program
+but gave me write access to the subversion repository on Sourceforge.
+The end result is that now the code build on Linux and is capable of
+saving and loading the collected frequency response data in CSV
+format. The application is quite nice and flexible, and I was able to
+select the input and output audio interfaces independently. This made
+it possible to use a USB mixer as the input source, while sending
+output via my laptop headphone connection. I lacked the hardware and
+cabling to figure out a different way to get independent cabling to
+speakers and microphone.</p>
+
+<p>Using this setup I could see how a large range of high frequencies
+apparently were not making it out of my speakers. The picture show
+the frequency response measurement of one of the speakers. Note the
+frequency lines seem to be slightly misaligned, compared to the CSV
+output from the program. I can not hear several of these are high
+frequencies, according to measurement from
+<a href="http://freehearingtestsoftware.com">Free Hearing Test
+Software</a>, an freeware system to measure your hearing (still
+looking for a free software alternative), so I do not know if they are
+coming out out the speakers. I thus do not quite know how to figure
+out if the missing frequencies is a problem with the microphone, the
+amplifier or the speakers, but I managed to rule out the audio card in my
+PC by measuring my Bose noise canceling headset using its own
+microphone. This setup was able to see the high frequency tones, so
+the problem with my stereo had to be in the amplifier or speakers.</p>
+
+<p>Anyway, to try to role out one factor I ended up picking up a new
+set of speakers at a flee marked, and these work a lot better than the
+old speakers, so I guess the microphone and amplifier is OK. If you
+need to measure your own speakers, check out AUDMES. If more people
+get involved, perhaps the project could become good enough to
+<a href="https://bugs.debian.org/910876">include in Debian</a>? And if
+you know of some other free software to measure speakers and amplifier
+performance, please let me know. I am aware of the freeware option
+<a href="https://www.roomeqwizard.com/">REW</a>, but I want something
+that can be developed also when the vendor looses interest.</p>
+
+<p>As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>