After a hearing damage has been diagnosed on a newborn child with the aid of brain-stem audiometry and rectangular pulses, a more detailed hearing examination with tone bursts must be performed as soon as possible. Only with the aid of this longer examination can it be decided whether the hearing ability of the infant can - and should - be improved by means of a hearing aid. The standardized tone bursts consist of five rising and five fading sound waves with frequencies between 500 Hz and 8000 Hz. Reference hearing thresholds for these test signals presented with repetition rates of 20 Hz are still lacking. This is why the corresponding subjective hearing thresholds were determined at PTB with the aid of a group of 25 normally hearing young adults (age between 18 and 25 years), to trace the objective results of brain-stem audiometry back to the subjective standard hearing threshold. Figure 1 shows the results layed down on an artificial ear in accordance with IEC 60318-1 for an audiometry earphone. Within the scope of this investigation, a model was developed which allows for any audiometer frequency, repetition rate and sound transducer, the respective hearing threshold for tone bursts to be calculated from the associated hearing threshold for long-standing sinusoidal tones (pure tones). A tone burst hearing threshold calculated on the basis of this model for the HDA 200 earphone is also plotted in Figure 1. The agreement be-tween measured and calculated values is very good. The differences lie at maximally 1,3 dB.