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Area Acoustics and electroacoustics / Underwater acoustics

IEV ref 801-32-62

Symbol
LS

en
source level
sonar source level
SL
sum of sound pressure level Lp(x)MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamitamaaBa aaleaacaWGWbaabeaakmaabmaabaGaamiEaaGaayjkaiaawMcaaaaa @3A59@, at position xMathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamiEaaaa@36D4@, and propagation loss from the source position to the receiver position, NPL=(xx0)MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamOtamaaBa aaleaacaqGqbGaaeitaaqabaGccqGH9aqpdaqadaqaaiaadIhacqGH sislcaWG4bWaaSbaaSqaaiaaicdaaeqaaaGccaGLOaGaayzkaaaaaa@3EE8@, where x0MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamiEamaaBa aaleaacaaIWaaabeaaaaa@37BA@ is the source position

Note 1 to entry: In equation form, LS=Lp+NPLMathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamitamaaBa aaleaacaqGtbaabeaakiabg2da9iaadYeadaWgaaWcbaGaamiCaaqa baGccqGHRaWkcaWGmbWaaSbaaSqaaiaabcfacaqGmbaabeaaaaa@3E36@.

Note 2 to entry: Source level is only defined for an equivalent monopole (point) source, where the sonar is treated as a point source of sound. For this treatment to be valid, the measurement position, xMathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamiEaaaa@36D4@, shall be in the acoustic far field of the sonar source.

Note 3 to entry: This definition of source level is consistent with that of ISO 18405, which is more generally applicable, as it is valid for a finite source.

Note 4 to entry: When sound pressure level is defined as ten times the logarithm of the mean square pressure, the reference value for source level is 1 µPa2m2 and the reference value for propagation loss is 1 m2.

Note 5 to entry: When sound pressure level is defined as twenty times the logarithm of the root-mean-square pressure, the reference value for source level is 1 µPa·m and the reference value for propagation loss is 1 m.

Note 6 to entry: This note applies to the French language only.


fr
niveau source, m
niveau source du sonar, m
SL, m
somme du niveau de pression acoustique Lp(x)MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamitamaaBa aaleaacaWGWbaabeaakmaabmaabaGaamiEaaGaayjkaiaawMcaaaaa @3A59@, à la position xMathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamiEaaaa@36D4@, et de la perte de propagation entre la position source et la position de réception, NPL=(xx0)MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamOtamaaBa aaleaacaqGqbGaaeitaaqabaGccqGH9aqpdaqadaqaaiaadIhacqGH sislcaWG4bWaaSbaaSqaaiaaicdaaeqaaaGccaGLOaGaayzkaaaaaa@3EE8@, où x0MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamiEamaaBa aaleaacaaIWaaabeaaaaa@37BA@ est la position source

Note 1 à l'article: Sous forme d'équation: LS=Lp+NPLMathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamitamaaBa aaleaacaqGtbaabeaakiabg2da9iaadYeadaWgaaWcbaGaamiCaaqa baGccqGHRaWkcaWGmbWaaSbaaSqaaiaabcfacaqGmbaabeaaaaa@3E36@.

Note 2 à l'article: Le niveau source du sonar est défini uniquement pour une source (ponctuelle) simple équivalente, avec laquelle le sonar est traité comme une source acoustique ponctuelle. Pour assurer la validité de ce traitement, la position de mesure, xMathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGacaGaaiaabmqaamaabaabaaGcbaGaamiEaaaa@36D4@, doit se situer dans le champ lointain acoustique de la source du sonar.

Note 3 à l'article: Cette définition du niveau source est conforme à celle donnée dans l'ISO 18405, applicable d'une manière plus générale, dans la mesure où elle est valable pour une source finie.

Note 4 à l'article: Lorsque le niveau de pression acoustique est défini comme correspondant à dix fois le logarithme de la pression quadratique moyenne, la valeur de référence du niveau source est 1 µPa2m2 et la valeur de référence de la perte de propagation est 1 m2.

Note 5 à l'article: Lorsque le niveau de pression acoustique est défini comme correspondant à vingt fois le logarithme de la pression efficace, la valeur de référence du niveau source est 1 µPa·m et la valeur de référence de la perte de propagation est 1 m.

Note 6 à l'article: Le terme abrégé "SL" est dérivé du terme anglais développé correspondant "source level".


ar
مستوى المصدر
مستوى المنبع

de
Sonarpegel, m
Sonarquellenpegel, m
SL

ko
음원 수준

ja
音源レベル
送波レベル
ソースレベル

pl
poziom źródła, m

pt
nível da fonte
nível da fonte do sonar

zh
声源级
声呐声源级

Publication date: 2021-02
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