Plantronics H91 User Manual page 7

DIAGRAM KEY
GB
Fig. 1 Adjusting the Headband and Receivers
To adjust the headband, lengthen or shorten the band until it
fits comfortably. The click-stop feature keeps the headband
securely adjusted.
Position the headset receivers so that the foam cushions sit
comfortably over the centre of your ears.
Fig. 2 On models with only one receiver, position the stabiliser T-bar
above your ear.
Fig. 3 Standard Models
Hold the receiver securely against your ear with one hand.
With the other hand, adjust the click-stop mounting and the
voice tube so that the tip sits two finger-widths from the corner
of your mouth. (To prevent breath noise, avoid putting the voice
tube in front of your mouth).
Fig. 4 Noise Cancelling Models
Carefully shape boom with both hands as shown. Do not bend
or twist the boom within 50mm of the microphone.
Fig. 5 Position the click-stop mounting and boom so that the
microphone is two finger-widths from the corner of your mouth.
Make sure that the front of the microphone faces your mouth. If
necessary, carefully rotate the microphone into the proper
position. However, you should try to avoid repeated twisting of
the boom.
Fig. 6 Adjusting the Tone Control
Adjust the tone by moving the tabs on the receiver as shown.
To equalise the sound in both ears, move the tabs to the same
setting on each receiver.
Fig. 7 To emphasise lower, or bass tones, move the receiver tabs to the
position marked "o".
To emphasise higher, or treble tones, move the receiver tabs to
the position marked "
5
• ".