Resources

Engineering Notes

Engineering Notes are useful resources to enhance or refresh knowledge, covering a broad spectrum of subjects they are available to download, as required.

Index to Engineering Notes

  • Issue 12
    E-note No.0

Measuring noise voltages in different ways

  • Issue 2
    Engineering Note No.1

Measuring the wide-band sensitivity of a loudspeaker

  • Issue 2
    Engineering Note No.2

Matched microphone attenuator

  • Issue 2
    Engineering Note No.3

Methods of measurement for loudspeaker line transformers

  • Issue 1
    Engineering Note No.4

Fuses for mains primary circuits

  • Issue 5
    Engineering Note No.5

Methods of measurement for autotransformer loudspeaker line volume controls

  • Issue 3
    Engineering Note No.6

Insulation resistance

  • Issue 4
    Engineering Note No.7

'100V line' dummy load

  • Issue 4
    Engineering Note No.8

Optimising the overall efficiency of a system

  • Issue 3
    Engineering Note No.9

Installation Instructions

  • Issue 3
    Engineering Note No.10

Loudspeakers, impedance and power

  • Issue 3
    Engineering Note No.11

'Power' tappings on 100 V line transformers

  • Issue 3
    Engineering Note No.12

'Earthing' of loudspeakers

  • Issue 3
    Engineering Note No.13

Fire alarm monitoring techniques

  • Issue 1
    Engineering Note No.14

CE-marking terms

  • Issue 2
    Engineering Note No.15

Rectifier filter capacitors

  • Issue 2
    Engineering Note No.16

Measuring Thiele-Small parameters of a loudspeaker

  • Issue 1
    Engineering Note No.17

Balanced circuits and differential amplifiers

  • Issue 1
    Engineering Note No.18

Optimum number of turns for an AFILS loop

  • Issue 2
    Engineering Note No.19

Supply current requirements for a PA/VA installation

  • Issue 1
    Engineering Note No.20

Measuring AFILS with pink noise

  • Issue 2
    Engineering Note No.21

Capacitors in series with loudspeakers

  • Issue 2
    Engineering Note No.22

New AFILS standard – how strong is your magnetic field?

  • Issue 1
    Engineering Note No.23

Sound System Test, Alignment, and Certification – Part 1

  • Issue 1
    Engineering Note No.24

Sound System Test, Alignment, and Certification – Part 2

  • Issue 1
    Engineering Note No.25

Sound System Test, Alignment, and Certification – Part 3

  • Issue 1
    Engineering Note No.26

Automatic gain control, limiting and compression

  • Issue 1
    Engineering Note No.27

Finding the earth fault on an induction loop

  • Issue 1
    Engineering Note No.28

Analogue or Digital?

  • Issue 1
    Engineering Note No.29

The dynamic range of a microphone

  • Issue 1
    Engineering Note No.30

Where did the wind blow my sound?

  • Issue 1
    Engineering Note No.31

Don't put a sock in it!

  • Issue 1
    Engineering Note No.32

Free and low-cost software

  • Issue 1
    E-note No.33

Calculating loudspeaker line losses using LTspice and MiscEl

  • Issue 1
    Engineering Note No.34

Coverage angle and coverage area of a ceiling loudspeaker

  • Issue 1
    Engineering Note No.35

Headphone 'peakers'

  • Issue 1
    Engineering Note No.36

Where do I put my induction loop?

  • Issue 1
    Engineering Note No.37

AFILS and the 'ideal rabbit'

  • Issue 2
    Engineering Note No.38