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“statistisch” invallend geluid

English translation: 'randomly' incident sound

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
Dutch term or phrase:“statistisch” invallend geluid
English translation:'randomly' incident sound
Entered by: Ken Cox

10:31 Apr 22, 2005
Dutch to English translations [PRO]
Tech/Engineering - Engineering (general) / sound absorption tests
Dutch term or phrase: “statistisch” invallend geluid
This phrase comes up in a report on the sound absorption of screens used to divide up office space. Here’s a description of the screens as background:

De schermen bestaan uit een metalen frame waartegen aan beide zijden panelen worden aangebracht die aan de buitenzijde met stof bekleed zijn. De panelen bestaan uit spaanderplaat met gaten; de gehele spouw was gevuld met vlokkenschuim.

The sound absorption measurements were carried out in a reverberation room (nagalmkamer).

Meetresultaten
Op blad 7 is de totale absorptie per scherm in grafiek- en tabelvorm gegeven. Hierbij moet worden opgemerkt dat de absorptiewaarden bepaald volgens de nagalmmethode geen materiaalconstanten zijn die men in willekeurige gevallen zou kunnen gebruiken voor de berekeningen van nagalmtijden en de vergelijking van materialen. De absorptiewaarden volgens deze methode verkregen zijn namelijk alleen geldig voor **“statistisch” invallend geluid** zoals optreedt in het geval van een “diffuus” geluidveld. Bovendien is de absorptie van de configuratie afhankelijk van de wijze van bevestigen van het materiaal.

Eurodicautom does have “statistisch geluidniveau” (exceedance value), but I’m not sure whether that’s relevant here. Needless to say, can’t find any support for “statistical incident sound/noise”. Thanks for any enlightenment.
MoiraB
France
Local time: 19:39
sound with statistically uniform distribution of the direction of incidence
Explanation:
I think this is what is meant. See e.g.

PDF] Realization of a Diffuse Sound Field with a PC-Based Sound Card ...
... field are equal is called the ”diffuse field distance”. The equal. statistical distribution of the direction of the sound incidence at ...
www.unibw-hamburg.de/ant/dafx2002/ papers/DAFX02_Weikert_diffuse_sound_field.pdf

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Note added at 36 mins (2005-04-22 11:08:25 GMT)
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In engineering/scientific terms that\'s probably \'acoustic energy\' instead of \'sound\'...

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Note added at 4 hrs 14 mins (2005-04-22 14:46:23 GMT)
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I essentially agree with Jack\'s comment; IMO it\'s a question of how far you want to go in filling in the blanks in the source text (which is telegraphic at best). From the cited source: \'an ideal diffuse sound field is determined by the definition that from all space directions the sound incidence at the measuring place is equally strong and equally distributed. However, the average value over time of the sound intensity vector is zero\'. From a strictly physical perspective, any sort of impinging sound can have a statistically distributed direction of incidence; what\'s important for a diffuse field is the nature of the distribution.

A perhaps safer translation in the case at hand would be \'random direction of incidence\'.

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Note added at 4 hrs 16 mins (2005-04-22 14:48:26 GMT)
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Or even better \'random intensity and dirction of incidence\'.
Selected response from:

Ken Cox
Local time: 19:39
Grading comment
Thanks for your suggestion, and especially for the link, which shed some light on the darkness. Highlighted this phrase when I returned the job but haven't had any feedback (so what's new?).
4 KudoZ points were awarded for this answer



Summary of answers provided
3 +1sound with statistically uniform distribution of the direction of incidence
Ken Cox


  

Answers


35 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +1
“statistisch” invallend geluid
sound with statistically uniform distribution of the direction of incidence


Explanation:
I think this is what is meant. See e.g.

PDF] Realization of a Diffuse Sound Field with a PC-Based Sound Card ...
... field are equal is called the ”diffuse field distance”. The equal. statistical distribution of the direction of the sound incidence at ...
www.unibw-hamburg.de/ant/dafx2002/ papers/DAFX02_Weikert_diffuse_sound_field.pdf

--------------------------------------------------
Note added at 36 mins (2005-04-22 11:08:25 GMT)
--------------------------------------------------

In engineering/scientific terms that\'s probably \'acoustic energy\' instead of \'sound\'...

--------------------------------------------------
Note added at 4 hrs 14 mins (2005-04-22 14:46:23 GMT)
--------------------------------------------------

I essentially agree with Jack\'s comment; IMO it\'s a question of how far you want to go in filling in the blanks in the source text (which is telegraphic at best). From the cited source: \'an ideal diffuse sound field is determined by the definition that from all space directions the sound incidence at the measuring place is equally strong and equally distributed. However, the average value over time of the sound intensity vector is zero\'. From a strictly physical perspective, any sort of impinging sound can have a statistically distributed direction of incidence; what\'s important for a diffuse field is the nature of the distribution.

A perhaps safer translation in the case at hand would be \'random direction of incidence\'.

--------------------------------------------------
Note added at 4 hrs 16 mins (2005-04-22 14:48:26 GMT)
--------------------------------------------------

Or even better \'random intensity and dirction of incidence\'.

Ken Cox
Local time: 19:39
Works in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 108
Grading comment
Thanks for your suggestion, and especially for the link, which shed some light on the darkness. Highlighted this phrase when I returned the job but haven't had any feedback (so what's new?).

Peer comments on this answer (and responses from the answerer)
neutral  Jack den Haan: I don't disagree, but 'uniform distribution' would be quite a significant addition to the source term. 'sound with statistically distributed direction of incidence' could be safer!
2 hrs
  -> Agree in principle; see additional note.
agree  Fred ten Berge
10 hrs
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