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28 2 Program concepts

2.2.3 Software
The software NOISY – with optional detection of confidence intervals of
percentile levels and noise separation – has been developed for entry of the
percentile level types L1 , L5 , L50 , L70 , L90 , L95 , L99 and of the limits
of their confidence levels by means of measurement instruments in Online
operation. During the measurement, the percentile level types and their
confidence intervals are indicated and output via screen and printer.
The measuring software NOISY comprises the criterion substantiated in [1]
which requires to find out whether the output measured value is meaningful at
all, i.e., whether both confidence intervals for the exceedance ratio q can be
specified in the value range defined for them. If this criterion is not met, no
confidence interval is output.

2.2.4 Measuring examples for noise immissions
Below, some examples for typical noise immission situations are described
together with their curve in time and the magnitude of the potentially present
measurement uncertainties. The examples illustrate the basic situation for
application of this online monitoring with measurement instruments to
quality-controlled noise separation by means of short-time measurements.