AmpliVox 260 - 3.4.3 Description of Function of Other Keys

USING THE AUDIOMETER
11 MODEL 260 INSTRUCTION FOR USE
Air Conduction ULL: Use the NO and YES keys to disable or enable the uncomfortable loudness level (ULL)
function; if enabled, the thresholds recorded will be stored, printed & transferred as ULL
results
3.4.3. DESCRIPTION OF FUNCTION OF OTHER KEYS
PULSE This enables the pulse tone present function when the PRESENT key is operated; the indicator above
the key illuminates green
MASK This switches on masking at 30dBHL; narrow band noise for pure tones, and speech-weighted noise
for speech; the indicator above the key illuminates green
CONSTANT This switches tone or speech signal on continuously; the indicator above the key illuminates green; it
may be interrupted by pressing the PRESENT key
+20dB This enables tone levels to be presented with up to 20dB higher output; press the key and then use
SIGNAL  to access the extra 20dB; an indicator above the key illuminates green to show that the
function is active, and an additional display message indicates levels greater than 100dBHL. Note: this
function will not operate if continuous tone presentation has been enabled.
FREEFIELD This disconnects the headphones and bone vibrator,routes signals to LINE output socket and outputs
warble tones instead of pure tones; note that no masking is available in Free Field with warble tones;
the indicator above the key illuminates green
SPEECH Use this key to cycle through the selection of LINE input (for recorded speech), MIC input (for live
speech from MIC 1), or speech facility off; the indicator above the key illuminates green
BONE Outputs the signal to the bone vibrator; the indicator above the key illuminates green
TALKOVER Hold this key to interrupt the test and route the operator’s voice from the front panel microphone (or
MIC 1 input) to the headset; the level is adjusted with the SIGNAL  keys
TALKBACK Press this key to route the signal from MIC 2 to the MONITOR output; the indicator above the key
illuminates green press again to de-activate; hold the button down to adjust the talkback level using
the SIGNAL  keys
LEFT Press once to select the left ear; the indicator above the key illuminates green; if the left ear is already
selected press again to store the displayed signal value as a threshold (or a ULL if this has been
selected)
RIGHT Press once to select the right ear; the indicator above the key illuminates green ; if the right ear is
already selected press again to store the displayed signal value as a threshold (or a ULL if this has been
selected)
SIGNAL Press the  keys to decrease or increase the level of the tone presented in 2.5dB or 5dB steps (see
Section 3.4.2); to scroll through the range keep the key pressed
FREQUENCY Press the  key to select a lower frequency and the  key to select a higher frequency
MASKING With the MASK function on, press the MASKING  keys to decrease or increase the masking level
in 2.5dB or 5dB steps (see Section 3.4.2); to scroll through the range keep the key pressed
These keys are also used to set the LINE & MIC levels in SPEECH mode