Recognizing that the objectives of an integrated approach to minimizing pollution and the amount of waste resulting from the operation of industrial installations and other sources are to achieve a high level of protection for the environment as a whole, to move towards sustainable and environmentally sound development and to protect the health of present and future generations,

measured at a distance of one (1) m from the source of the sound.

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.

There must be no obstacle which could affect the sound field within the vicinity of the microphone and no persons shall stand between the microphone and the sound source.

At the beginning and end of each set of measurements, the sound-level meter must be calibrated according to the manufacturer's instructions by means of an appropriate sound source (e. g. a pistonphone).

For measurements, the A-weighted sound level of sound sources other than those of the vehicle to be tested and of wind effects must be at least 10 dB(A) below the sound level produced by the vehicle.

6A001.a.l.c. does not control electronic sources which direct the sound vertically only, or mechanical (e.g., air gun or vapour-shock gun) or chemical (e.g., explosive) sources.

1995 "Acoustics - Determination of sound power levels of noise sources using an enveloping measurement surface over a reflecting plane".

The premises shall be such that they are easily cleaned and shall be separated from any source of noise; consequently, they shall preferably be soundproofed.

"acoustical planning" shall mean controlling future noise by planned measures, such as land-use planning, systems engineering for traffic, traffic planning, abatement by sound-insulation measures and noise control of sources;

Passive sensors for determining bearing to specific electromagnetic source (direction finding equipment) or terrain characteristics, designed or modified for use in space launch vehicles specified in 9A004 or sounding rockets specified in 9A104.

The sound source shall be:

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(A).

At the beginning and end of each set of measurements, the sound-level meter must be calibrated according to the manufacturer's instructions by means of an appropriate sound source (e.g. a pistonphone).

however, in the case of a sound source different from the original equipment audible warning device, the minimum sound level may be reduced to 100 dB (A), measured under the conditions of Appendix 4 of this Annex.

for measuring the sound pressure level on a measurement surface enveloping the source and for calculating the sound power level produced by the source.

For measurements, the A-weighted sound level of sound sources other than those of the vehicle to be tested and of wind effects must be at least 10 dB below the sound level produced by the vehicle.

the TV is connected to a power source, produces neither sound nor vision, and is exchanging/receiving data with/from an external source.

the TV is connected to a power source, produces neither sound nor vision, and is waiting to be switched into the modes

6A001.a.1.c. does not control electronic sources which direct the sound vertically only, or mechanical (e.g., air gun or vapour-shock gun) or chemical (e.g., explosive) sources.

a device consisting of several sound emission orifices that are excited by a single power source shall be considered to be an audible warning device;

Noise levels in the driver's compartments must be kept as low as possible, by limiting noise at source through appropriate measures (acoustic insulation, sound absorption).

the sounding pipes terminate in locations remote from ignition hazards unless precautions are taken, such as the fitting of effective screens, to prevent the oil fuel in the case of spillage through the terminations of the sounding pipes from coming into contact with a source of ignition;.

7A115 Passive sensors for determining bearing to specific electromagnetic source (direction finding equipment) or terrain characteristics, designed or modified for use in space launch vehicles specified in 9A004 or sounding rockets specified in 9A104.