Adjusting Tone Pitch: 50 Tones
When a Target Tone setting of 50 is selected for a Search
Profile, the Tone Pitch Advanced Setting behaves
differently.
To provide greater audio separation between ferrous and
non-ferrous targets, a deliberate gap can be set between
the highest possible pitch of the ferrous tones, and the
lowest possible pitch of the non-ferrous tones.
Therefore a non-ferrous target with a Target ID very close
to the ferrous range will sound much higher pitched and
therefore easy to distinguish as non-ferrous from the audio
signal alone.
Adjust the Tone Pitch of 50 tones in the same way as
adjusting the Tone Pitch of 1, 2 and 5 tones (page 47).
The non-ferrous setting cannot be a higher number than
the ferrous setting.
The example below shows how 'masking' sections of the
full pitch range makes it easier to hear a clear difference
between ferrous and non-ferrous targets.
Default Tone Pitch Gap
(1, 20)
Ferrous targets will be very low
pitched. Non-ferrous targets
will sound distinctly higher
pitched than a ferrous target
with a similar Target ID.
Small Tone Pitch Gap
(11, 12)
No clear difference in pitch
between ferrous and non-
ferrous targets. They may be
indistinguishable from audio
alone.
Maximum Tone Pitch Gap
(1, 25)
A greater difference in Pitch
between ferrous and non-
ferrous targets gives very easy
differentiation.
The Tone Pitch setting of
1, 24 represented on the
Discrimination Scale when the
Tone Break setting is -5.
The 500 Hz non-ferrous tone
range is spread across Tone
Region 2 (t2), and the 50 Hz
ferrous tone range is spread
across Tone Region 1 (t1).
This shows the same Tone pitch
setting, but a higher Tone Break
setting of 10.
This means that the 500 Hz high
tones becomes compressed into
fewer Target IDs, and the 50 Hz
low tones are stretched across
more Target IDs.
5 10
Highest PitchLowest Pitch Full Pitch Range
Tone Pitch setting adjustment range
1 to 25
t2 has a fixed wider pitch range width of 500 Hz
t1 has a fixed narrow pitch
range width of 50 Hz
5 10 15 20
251 5 20
t2: 500 Hz
range
t1: 50 Hz
range
t2: 500 Hz
range
t1: 50 Hz
range
Tone Pitch (Advanced Setting) | 48Contents
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