- OtoSimple II is a one-button,
device intended for screening seniors. Pressing the rectangular button turns on the unit and activates a 25 db HL 1000 Hertz tone. A tone is always active when the unit is on, even if no buttons are being pressed. Pressing the button again changes the frequency and the sound level remains at 25 db HL. The tone sequence is: 1000 Hz, 2000 Hz, 4000Hz and 500 Hz. The 500 Hz tone is presented last since this may be omitted unless the room is very quiet. Like the OtoPulse above, holding the button down starts the tone pulsing on and off every 200 milliseconds. However, this unit automatically changes to a 40 db HL sound level while pulsing. When the button is releases it automatically reverts back to a 25 db HL pure tone. This is useful for testing subjects with Tinnitus (ringing in the ears). The unit shuts itself off after 1 minute if no buttons are pushed. Refer to the user manual for a detailed description of its operation.