GB/T 6278-2012Simulated programme signal (English PDF)

1 Scope

This standard specifies the characteristics of the analog signal program signal.

This standard applies to all types of sound systems and equipment, and electro-acoustic device characteristics measurement and calibration.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 3241-2010 electro-acoustics octave and fractional octave filters

3 signal characteristics

The simulation program signal is not clipped Gaussian noise steady weighted average power spectral density characteristics of such a signal containing multiple languages

Music programs and various program source signals characteristics mean the average power spectral density is very similar. When using GB/T 3241-2010 specified

When 1/3oct filter measurements, weighted power spectrum should be consistent with the provisions of the table and Figure 11.

This pink noise signal can be obtained through the filter circuit shown in Figure 2.

If appropriate, when measured with a narrowband signal, applied in Table 1 and the band relative power level specified in FIG. 1. (For information about how

Use this signal amplifier and speakers especially for measurement and characterization of their characteristics are being studied.)

Note. It should be noted that in the entire frequency band measured signal power level than the 1/3oct measured zero decibel high power level of about 12.5dB.

Table 1 shows the analog signal power spectrum frequency

Hz

Relative power level dB

Tolerance limits dB frequency

Hz

Relative power level dB

Tolerance limits dB

20 125 -13.5 3.0 3.0 -0.5 0.6 0.6

25 160 -10.2 2.0 2.0 -0.2 0.5 0.5

40 -5.2 1.0 1.0 2500 0.5 0.5

50 -3.5 1.0 1.0 3150 0.5 0.5

63 -2.3 1.0 1.0 4000 0.5 0.5

80 -1.4 1.0 1.0 5000 0.5 0.5

100 -0.9 0.8 0.8 6300 0.5 0.5 […]