Valsts valodas centra izstrādātie transporta, infrastruktūras un sakaru termini

Konteksts: [..] The test track must be such that the conditions of a free sound field between the sound source and the microphone are attained to within 1 dB. [..]
Avots: Agreement concerning the adoption of uniform technical prescriptions for wheeled vehicles, equipment and parts which can be fitted and/or be used on wheeled vehicles and the conditions for reciprocal recognition of approvals granted on the basis of these prescriptions, Regulation No. 51 - Uniform provisions concerning the approval of motor vehicles having at least four wheels with regard to their noise emissions.