Frequency Lowering

Frequency Lowering is an algorithm that is used to improve audibility of high frequency sounds while preserving sound quality, thereby improving speech understanding. The algorithm replicates in real time inaudible, high frequency, speech information to a lower frequency region where it will be audible. Frequency Lowering is designed to benefit patients with steeply-sloping, moderate to severe, high frequency hearing loss. Frequency Lowering can be enabled/disabled per memory and is only available for Honor, Pride, Halo, Z Series, 3 Series, Pride IIC, Xino, Wi Series, Ignite, and X Series products.

If a valid audiogram exists that meets the audiometric criteria for frequency lowering and Best Fit All Memories is applied during an adult fitting, Frequency Lowering is automatically enabled for all memories except Disabled, Music, Streaming, and Stream Boost. If an adult has a valid audiogram but it doesn't meet the audiometric criteria, or if the patient is pediatric, Frequency Lowering is automatically disabled for all memories. However, Frequency Lowering can be enabled manually. If Frequency Lowering is enabled, a green/yellow shaded region displays on all fitting graphs except Tinnitus. The green shaded region represents the Source Region, which is the range where high frequency sounds are identified. The yellow shaded region represents the Target Region, which is the range the identified high frequency sounds are replicated.

If Frequency Lowering is enabled by default, the Source and Target Regions, Frequency Lowering Bandwidth, and Frequency Lowering Gain settings are set based on the patient's hearing loss. Frequency Lowering Bandwidth is a multi-parameter adjustment, affecting both the Source and Target Regions. Seven settings are available ranging from Minimum to Maximum. A more aggressive Frequency Lowering Bandwidth can be achieved by moving the control toward Maximum. Frequency Lowering Gain can be adjusted from -5 to 5 dB for Honor, Pride, and Pride IIC products and 0 to 10 dB for all other products, in 1 dB increments.

For assistance with solving patient issues regarding Frequency Lowering (e.g., /s/ sounds, lisping, etc.), see Expert Assistant.

  1. Connect and select the desired hearing aid(s) to adjust via Get Started.

  2. Click on the Read Device Settings or Load a Previous Session radio button and then click .

  3. Click Frequency Lowering.

    Tip:  The bold green curve on the fitting graph represents the high frequency speech output. To display the high frequency speech input, which is represented in a thin green curve, click the checkbox Display High Frequency Speech Input.
    Note:  Regardless of the graphical view currently selected, Real Ear Response output and High Frequency Speech Input always displays on the fitting graph while on this screen.
  4. Click on the specific memory to adjust if applicable or click to adjust all memories simultaneously.

    Note:  If adjusting Honor, Pride, or Pride IIC products, this feature is not available for the Music memory.
  5. Inspire automatically defaults to a binaural Select Binaural view if applicable. To adjust only the right or left hearing aid, click Select Right Only or Select Left Only.

    Note:  If fitting CROS/BiCROS devices, only the receiver aid can be adjusted, therefore, the side cannot be selected.
  6. Click the On or Off radio button to enable or disable Frequency Lowering.

    Note:  If a valid audiogram has not been entered for the patient, this field is disabled. If Off is selected, Frequency Lowering Bandwidth and Gain fields are disabled.
    Note:  If viewing binaurally, both hearing aids will be enabled or disabled based on the selection. To enable or disable the right or left hearing aid only, click Select Right Only or Select Left Only and then click On or Off.
  7. Click on the radio button representing the desired Frequency Lowering Bandwidth setting.

    Note:  The Source (green) and Target (yellow) Regions expand or contract based on the setting selected.
  8. Drag the slider bars Adjust gain all right Adjust gain all left to increase or decrease the Frequency Lowering Gain per ear side or click or to increase or decrease binaurally.