Doppler shift — User Guide

Praat script.

Author: Shai Cohen Affiliation: Department of Music, Bar-Ilan University, Israel Version: 0.1 (2025) License: MIT License Repo: https://github.com/ShaiCohen-ops/Praat-plugin_AudioTools

Contents:

What this does Quick start Parameters Outputs

What this does

Praat script.

Process Description: This script simulates the acoustic phenomenon of the Doppler Effect, where the perceived frequency of a sound changes as its source moves relative to the listener. It achieves this by applying a time-dependent frequency shift that accelerates over the duration of the sound, followed by an exponential amplitude decay to mimic distance-based volume loss.

Quick start

In Praat, select a Sound object.
Run script… → Doppler shift.praat.
Set parameters and click OK.
Output object appears (see Outputs).

Parameters (form fields)

Name (GUI)	Type	Default
base_shift	positive	1.0
shift_amount	positive	0.5
acceleration_exponent	positive	2
decay_base	positive	15
scale_peak	positive	0.99
play_after_processing	boolean	1

Outputs

Object name: output
Sample rate: unknown
Normalization: No automatic normalization