See also: What are A§E tests?

A§E contains two localization tests: (1) Azimuth localization and (2) ILD localization.

  • The azimuth localization is a typical localization test with 5 or 7 loudspeakers. This test requires the SoundC hardware.
  • The ILD localization test only requires 2 loudspeakers. It assesses the localization acuity based on high frequency interaural level differences and is mainly useful to evaluate cochlear implant recipients.

Azimuth Localization

The azimuth localization is based on stimuli presented through multiple loudspeakers of SoundC (currently 5 or 7 speakers).

A§E azimuth localisation results. Sound was presented from 7 loudspeakers 
and the listener had to point to the speaker he/she perceived to be source.

The following steps will guide you through the execution of a typical azimuth localization test.


Select SoundC and binaural test condition.


In the training mode, click on one of the speakers to send the stimulus to that speaker.


In the test mode, Audiqueen plays a stimulus and the listener should point to the speaker he/she feels the sound is coming from. Click on this speaker icon to enter the response.

ILD localization

The A§E ILD localization test is based on narrow band noise centred at 4000 Hz which is presented through two loudspeakers with different intensities to create an interaural loudness difference. This is used to assess the localization capacity as indication of the central integration of binaural input.

Have a look at the following video’s ILD localization:

Test Rationale


Typical Test Procedure

See also: How to perform A§E selftests?