Pediatric Noise

AC40 Support

Welcome to the product training for AC40 audiometer. On this page you will find an overview of all the available training materials and support.

Pediatric noise is a special noise stimuli that can be used as an alternative for pure tones, warble tones and narrow band noise. The use of pediatric noise is useful during sound field testing and visual reinforcement audiometry (VRA) as it helps to avoid standing waves as well as maintain the child’s interest during testing. In additional it is useful in other assessments, which requires narrow band noise such as pitch matching and minimum masking level.

Pediatric noise addresses two problems related to the use of narrow band noise.

In comparison, the narrow band noise is calibrated for effective masking of tonal sounds of the same dial setting. Practically speaking it means that the narrow band noise is a few dB louder than what is required for threshold measurements.

While the plateau of the pediatric noise and narrow band noise are of the same width, the pediatric noise has very steep slopes, 100dB/octave vs. 12dB/octave respectively. In case of sloping hearing losses, the use of pediatric noise will not result in off-frequency listening.

Below graph illustrates the shape of the pediatric noise at 1000Hz.

Headphones, insert phones or free field setup (FF)

Ped noise can be run ad stand-alone on the audiometer or via Diagnostic Suite.