Williams Sound
®
Helping People Hear
16
L
OW
P
ASS
F
ILTER
(M6)
The low pass filter will help to remove high frequency “noise” from the transmitted audio signal. This is typ-
ically used when there is a hiss is the audio line as a result of room noise, speech sibilants, or other high fre-
quency unpleasantries.
To select a Low Pass Filter cutoff frequency:
1) Press the down “ ” menu button (Figure 12) to select the LCD “Low Pass Filter” (M6) screen.
2) Press the “+” menu button to increase the cutoff frequency selection.
The cutoff frequency can be increased to a maximum of 16.0 kHz.
Press the “-” menu button to decrease the cutoff frequency selection.
The cutoff frequency can be decreased to a minimum of 3.2 kHz.
3) When the desired cutoff frequency is displayed, press the “Set” button to save the change
into memory.
No additional action is necessary. After 30 seconds of inactivity, the LCD screen will return to the
default display.
C
OMPRESSOR
S
LOPE
(M7)
Compression is typically used for voice and hearing assistance applications. It reduces the dynamic
range: For a listener who has difficulty hearing the quiet sounds of an audio broadcast, compression
will boost the quiet sounds to louder listening levels. For listening to music programs, concerts, etc.,
lower compression ratios or no compression is generally used.
The Compressor Slope has the following selectable compression ratios:
1.0:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.8:1, 2.0:1, 2.2:1, 2.5:1, 3.0:1, 3.5:1, 4.0:1, 4.5:1, 5.0:1, 5.5:1, 6.0:1.
NOTE: The T35 is shipped from the factory at a 1.0:1 compression ratio (no compression).
To select a compression ratio:
1) Press the “ ” menu button (Figure 12) to select the LCD “Compressor Slope” (M7) screen.
2) Press the “+” menu button to increase the steps of compression. The compression ratio can
increase to a maximum of 6:1, which produces generally loud output, even at very low audio level
signals.
Press the left “-” menu button to decrease the steps of compression. The compression can be
lowered to a minimum ratio of 1.0:1, which is no compression.
3) When the desired compression ratio is displayed, press the “Set” button to save the
change into memory. No additional action is necessary.
NOTE: The installer of the T35 needs to take care in using compression, because some hearing
impaired people cannot tolerate as loud of a sound as those with normal hearing.
^
^
IMPORTANT: Listen to the transmitted audio through the headphone jack, especially when
deciding on an appropriate low pass filter. This is a good way to ensure the listening audi-
ence is going to receive the highest audio quality.
Summary of Contents for Personal PA PPA T35
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