BS 6840-2:1993

Committees responsible
National foreword
Foreword
1. General terms
1.1 Sound system
1.2 Compatibility
1.3 Variable consumption apparatus
1.4 Noise signal
1.5 Rated values
2. Power
2.1 Relative power level
2.2 Power level
2.3 Available power from the source
2.4 Available power gain
3. Voltage
3.1 Relative voltage level
3.2 Voltage level
3.3 Voltage gain
3.4 E.M.F. gain (overall voltage gain)
4. Source e.m.f.
4.1 Equivalent source e.m.f.
5. Balance
5.1 Balanced circuits
5.2 Balanced inputs
5.3 Balanced outputs
6. Noise
6.1 Noise voltage
6.2 Signal-to-noise ratio
6.3 Equivalent noise source e.m.f.
7. Amplitude non-linearity
7.1 Introduction
7.2 Explanation of terms
7.3 Elucidation
8. Cross-talk and separation in multi-channel
     equipment
8.1 General
8.2 Cross-talk attenuation (from A to B)
8.3 Separation (of A from B)
9. Acoustic characteristics
9.1 Sound pressure level
9.2 Sound power level
9.3 Equivalent input sound pressure of a microphone
10. Polarity
10.1 Characteristics to be specified
10.2 Method of measurement
Annexes
Annex ZA (normative) Other international publications
         quoted in this standard with the references of
         the relevant European publications
National annex NA (informative) Cross-references
Figures
1. Balance of the input
2. Balance of the output
3. Distortion spectra
3a. Harmonic distortion
3b. Modulation distortion
3c. Difference-frequency distortion
3d. Total difference-frequency distortion