Acoustics Option
The Acoustics Option offers you a choice of the main analysis procedures for audio engineers.
To determine the Sound Level and Sound Power Level, you can use the Sound Level and Sound Power analysis objects. The computation of sound power in particular has become increasingly important in recent years, since it is required for the overall reduction of noise as well as for standardized labeling (e.g., for CE labeling) of machines.
The Loudness of a sound is a measurement for how loud a particular sound is perceived by humans as an auditory event. The loudness compares the physically measurable strength or amplitude of the sound (sound pressure level) to the loudness perceived by humans as perceived loudness. The perceived loudness is a psychoacoustic factor and depends on the sound pressure level, frequency spectrum and time response factors.
The sharpness of a sound is an auditory sensation which describes the particular aspect of the tonal perception that is correlated with the frequency distribution of the spectral envelope of sounds. The sharpness is a psychoacoustic variable and is determined by calculating the loudness.
For the frequency analysis, due to the constant relative bandwidth, the Octave and Third Octave Analysis is often used. These are calculated in the Acoustics Option using time domain filters so that accuracy, especially for lower frequencies, is not impaired. Bandwidths from octave via third octave through to 1/24 octave are available.
Observed Standards
Standard |
Description |
|---|---|
IEC 651, EN 60651 |
Sound level meter |
IEC 804, EN 60804 |
Integrating-averaging sound level meter |
IEC 1260, EN 61260 |
Band filter for octaves and fractions of octaves |
(DIN 45651) |
Octave filter for electroacoustic measurements |
(DIN 45652) |
Third octave filter for electroacoustic measurements |
ISO 3744, 3745, 3746, DIN EN ISO 3744, 3745, 3746 |
Determines the sound power level of sources of noise. Enveloping surface method in an essentially free field over a reflecting plane. Precision grades 1 (3745), 2 (3744), and 3 (3746). |
(DIN 45635) |
Noise measurements for machines |
ISO 532-1, ISO 532-2, ISO 532 A, ISO 532 B, DIN 45631 |
Procedure for calculating the loudness level and the loudness from the sound spectrum; E. Zwicker method ISO 532 B, DIN 45 631) and Stevens method (ISO 532 A). |
DIN 45692 |
Measurement technique for the simulation of the auditory sensation of sharpness |