Vibration Tools – Random (PSD + Audio)

Settings

Mass (kg)

σ (Sigma) – peak estimate

Audio → PSD

Audio file (mp3/wav)

We map the average spectrum of your song to a PSD shape (relative). Absolute level is set by target g_rms (optional).

Target g_rms (optional) Normalize PSD to target g_rms

Start (s)

Duration (s)

FFT size

Overlap (%)

Min freq (Hz)

Max freq (Hz)

Band resolution

Weighting

PSD – add point

Frequency (Hz)

PSD (g²/Hz)

PSD points

Frequency (Hz)	PSD (g²/Hz)	Action

Audio

Master level

Pretest & Duration

Pretest levels: −12, −9, −6, −3, 0 dB — 30 s each.

Pretest: time per step (s)

Step ramp (ms)

Test duration (min, 10–60)

Note: The PSD shape is followed; absolute amplitude depends on your amplifier/calibration.

Results

g_rms

—

F_rms

—

x_rms

—

Stroke p-p

—

Peak velocity ≈ σ·v_rms

—

Peak displacement ≈ σ·x_rms

—

Limits: 120 kN, 2.2 m/s, 38 mm (peak)

Settings

Audio → PSD

PSD – add point

PSD points

Audio

Pretest & Duration

Results

PSD

Information & Standards

DIN / ISO (selection)

Glossary