14 MEASUREMENT OF TONES – Tonality
The instrument assesses the audibility of tones based on the next standards:
• ISO 20065:2016,
• ISO 226:2003,
• ISO 226:1987.
See Appendix F.
Note: It is recommended to familiarize with the Appendix F before proceeding. This chapter
describes only the navigation of the instruments, whereas Appendix F describes the Objective
Method for Assessing the Audibility of Tones in Noise – Engineering Method (according to
ISOS 20065:2016) applied in the instrument.
Note: The Tonality analysis is performed after collecting the necessary data measured with the
Sound Level function and, depending on the standard, the 1/3 Octave or FFT function.
14.1 SELECTING THE TONALITY FUNCTION
To activate the Tonality analysis function,
select the Tonality position in the
Measurement Function list and press
<ENTER>.
Note: The Tonality function is optional and should be unlocked by entering the activation code in
the text editor screen, which is opened after first attempt to select this function. Once unlocked this
option will be ready to use permanently.
Note: It is not possible to change the current function during running measurements.
In this case the instrument displays for about 2 seconds the warning: “Measurement in Progress”. To
change the current measurement function, the measurement must be stopped!
The execution of the Tonality function
depends on the standard selected in the
Tonality list of the Measurement section.
Other settings are set automatically but
some of them can be modified in the
different items of the Measurement menu.
In the Standard position, you can select the
standard according to which tones will be
defined: ISO 20065-16, ISO 226-2003 or
ISO 226-1987.
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