0
–10
0
Hard Limiter (Always Functional)
Compress
–10
–20
–20
–30
–30
–40
–40
+10
+10
+20
Hard Limit
Noise Reduction
Soft Limit
Audio "OK" Light ON
Audio "High" Light ON
RELATIVE INPUT LEVEL
RELATIVE OUTPUT LEVEL
Figure 7: T20 Audio Processor Performance
Audio Processor Options
The audio processor in the T20 is capable of four
modes of operation. The effects of these modes are
charted in figure 7.
Compressor Mode
Compressor mode is used for hearing assistance to
limit the dynamic range of the audio signals.
Hearing impaired people generally have a reduced
tolerance for wide dynamic range. The T20 is
shipped in Compressor Mode.
Noise Reduction Mode
The T20 can also be configured for for 2:1
compression. This is for use only with a receiver that
has a 2:1 expansion circuit for noise reduction.
Noise reduction is typically used in narrow-band
operation for high quality audio.
Soft Limit Mode
The T20 can also operate in a soft limit mode, which
allows full dynamic range of audio signals. This
mode may be preferred for musical programs, but
may provide too much dynamic range for hearing
impaired listeners.
Hard Limit Mode
Hard Limit Mode is useful if the T20 has been
installed with external signal processing.
For assistance in selecting an alternate audio
processing mode, contact Williams Sound technical
assistance at 1-800-328-6190.
Williams Sound
®
Helping People Hear
11
Summary of Contents for PERSONAL PA System 500
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