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FREQUENCY-DEPENDENT [5 records]
Record 1 - internal organization data 2007-03-14
Record 1, English
Record 1, Subject field(s)
- Acoustics (Physics)
Record 1, Main entry term, English
- frequency weighting
1, record 1, English, frequency%20weighting
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
[A method] used in measurement of overall sound levels to take account of the frequency-dependent loudness characteristics of ears at different sound levels. 2, record 1, English, - frequency%20weighting
Record number: 1, Textual support number: 1 OBS
A-weighted measurements attenuate sounds below about 1000 Hz (low sound levels), B-weighting rolls off frequencies below about 200 Hz (middle sound levels), and C-weighting rolls off below about 50 Hz (high sound levels). 2, record 1, English, - frequency%20weighting
Record 1, French
Record 1, Domaine(s)
- Acoustique (Physique)
Record 1, Main entry term, French
- pondération fréquentielle
1, record 1, French, pond%C3%A9ration%20fr%C3%A9quentielle
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Procédé utilisé pour les mesures de niveaux acoustiques globaux, qui permet de prendre en compte les caractéristiques de bruit, variables suivant la fréquence, les oreilles et ceci à différents niveaux acoustiques. 2, record 1, French, - pond%C3%A9ration%20fr%C3%A9quentielle
Record number: 1, Textual support number: 1 OBS
Les mesures de pondération A atténuent les sons en dessous de 1 000 Hz (niveaux acoustiques bas), les pondérations B se situent à des fréquences inférieures à 200 Hz (niveaux acoustiques intermédiaires) et les pondérations C sont à des fréquences inférieures à 50 Hz (niveaux acoustiques élevés). 2, record 1, French, - pond%C3%A9ration%20fr%C3%A9quentielle
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2004-02-23
Record 2, English
Record 2, Subject field(s)
- Telecommunications Transmission
Record 2, Main entry term, English
- selectivity
1, record 2, English, selectivity
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The ability of a receiver to discriminate, by frequency-dependent selection, between a desired signal and co-existent undesired signals at other frequencies. 2, record 2, English, - selectivity
Record 2, French
Record 2, Domaine(s)
- Transmission (Télécommunications)
Record 2, Main entry term, French
- sélectivité
1, record 2, French, s%C3%A9lectivit%C3%A9
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Aptitude d'un récepteur à séparer le signal utile d'un signal brouilleur, en utilisant le décalage ou les répartitions différentes de leurs composantes spectrales sur l'échelle des fréquences. 2, record 2, French, - s%C3%A9lectivit%C3%A9
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Transmisión (Telecomunicaciones)
Record 2, Main entry term, Spanish
- selectividad
1, record 2, Spanish, selectividad
correct, feminine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 DEF
Característica de un receptor que determina el grado en el cual él mismo es capaz de diferenciar entre la señal deseada y las señales indeseadas o perturbaciones de frecuencias diferentes. 1, record 2, Spanish, - selectividad
Record 3 - internal organization data 1994-12-19
Record 3, English
Record 3, Subject field(s)
- Signals (Military)
- Air Communications (Air Forces)
- Radio Transmission and Reception
Record 3, Main entry term, English
- frequency-dependent
1, record 3, English, frequency%2Ddependent
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
The path of refraction is also frequency-dependent, which means that to reach a specific receiv-er, an HF radio operator will not be able to select from the full band of channels. 1, record 3, English, - frequency%2Ddependent
Record 3, French
Record 3, Domaine(s)
- Transmissions de campagne (Militaire)
- Communications aériennes (Forces aériennes)
- Émission et réception radio
Record 3, Main entry term, French
- varie avec la fréquence
1, record 3, French, varie%20avec%20la%20fr%C3%A9quence
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Les trajectoire de propagation varient avec la fréquence, de sorte qu'en un lieu et e un instant donnés, une partie seule ment de la bande HF est utilisable. 1, record 3, French, - varie%20avec%20la%20fr%C3%A9quence
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 1993-10-05
Record 4, English
Record 4, Subject field(s)
- Acoustics (Physics)
Record 4, Main entry term, English
- frequency-response function
1, record 4, English, frequency%2Dresponse%20function
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
The frequency-dependent ratio of the motion-response phasor to the phasor of the excitation force. 1, record 4, English, - frequency%2Dresponse%20function
Record number: 4, Textual support number: 1 OBS
Frequency-response functions are properties of linear dynamic systems which do not depend on the type of excitation function. Excitation can be harmonic, random, or transient functions of time. The test results obtained with one type of excitation can thus be used for predicting the response of the system to any other type of excitation. 1, record 4, English, - frequency%2Dresponse%20function
Record 4, French
Record 4, Domaine(s)
- Acoustique (Physique)
Record 4, Main entry term, French
- fonction de réponse en fréquence
1, record 4, French, fonction%20de%20r%C3%A9ponse%20en%20fr%C3%A9quence
correct, feminine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Rapport sélectif entre le vecteur tournant de réponse au mouvement et le vecteur tournant de la force d'excitation. 1, record 4, French, - fonction%20de%20r%C3%A9ponse%20en%20fr%C3%A9quence
Record number: 4, Textual support number: 1 OBS
Les fonctions de réponse en fréquence sont des propriétés des systèmes dynamiques linéaires qui ne dépendent pas du type de fonction d'excitation. L'excitation peut être une fonction du temps harmonique, aléatoire ou transitoire. Les résultats d'essai obtenus avec un type d'excitation peuvent donc être utilisés pour prévoir la réponse du système à tout autre type d'excitation. 1, record 4, French, - fonction%20de%20r%C3%A9ponse%20en%20fr%C3%A9quence
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 1981-08-28
Record 5, English
Record 5, Subject field(s)
- Radioelectricity
- Telecommunications
Record 5, Main entry term, English
- compatible single sideband system 1, record 5, English, compatible%20single%20sideband%20system
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 OBS
One way to circumvent the problems of SSB broadcasting was to seek a variant of SSB modulation having an envelope comparable with the envelope of double sideband modulation(DSB). Such compatible single sideband(CSSB) systems were developed and tested but, although large band saving could be obtained, frequency-dependent transmission losses made the system liable to non-linear distortion. 1, record 5, English, - compatible%20single%20sideband%20system
Record 5, French
Record 5, Domaine(s)
- Radioélectricité
- Télécommunications
Record 5, Main entry term, French
- système à bande latérale unique compatible 1, record 5, French, syst%C3%A8me%20%C3%A0%20bande%20lat%C3%A9rale%20unique%20compatible
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 OBS
Pour surmonter ces difficultés, on a cherché à mettre au point une variante de la modulation BLU dont l'enveloppe serait comparable à celle de la modulation à double bande latérale (DBL). Des systèmes à bande latérale unique compatible (BLUC) ont été ainsi élaborés et mis à l'essai mais, s'ils permettent d'importantes économies sur la largeur de bande, l'affaiblissement de transmission en fonction de la fréquence les rend sensibles à la distorsion de non-linéarité. 1, record 5, French, - syst%C3%A8me%20%C3%A0%20bande%20lat%C3%A9rale%20unique%20compatible
Record 5, Spanish
Record 5, Textual support, Spanish
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