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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Usually, the sound level meter contains filters and circuitry to bias the readings so that the instrument responds more like the human ear - "deaf" to low frequencies and most sensitive to the mid-frequencies ... Such readings are called A-scale readings. Most noise level readings ... are A-scale readings (often expressed as dBA).  1, record 1, English, - A%2Dscale%20reading

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

[...] les acousticiens ont établi trois courbes de pondération, dites courbes A, B, C [...]. Ces courbes correspondent à des réseaux pondérateurs que l'on intercale dans le circuit de mesure [du sonomètre] et qui affaiblissent [...] les fréquences graves et aiguës [...]; on obtient ainsi les lectures en "gamme A, B ou C", ou encore en décibels A, B ou C.  1, record 1, French, - lecture%20en%20gamme%20A

Record 1,  Textual support,  Spanish