macOS VoiceOver event sounds · UI feedback
Alert
a16d826ba229
Level measurements
Integrated-19.8 LUFS
Maximum momentary-18.4 LUFS
True peak-12.0 dBTP
RMS-21.5 dBFS
Active RMS-21.2 dBFS
Duration0.461 s
| Maximum short-term | — |
|---|---|
| Loudness range | — |
| Sample peak | -12.0 dBFS |
| Sample crest factor | 9.4 dB |
| True-peak crest factor | 9.5 dB |
| Active duration | 0.429 s |
Level over time
RMS · 9.977 ms · 47 points
Each point is the channel-combined RMS of a non-overlapping frame. Values below −80 dBFS are pinned to the chart floor for display; the canonical JSON retains measured values, and digital silence remains null.
Frequency characteristics
Spectral centroid578 Hz
Peak frequency587 Hz
200 Hz–8 kHz energy100.0 %
Frequency is shown on the horizontal axis and band energy on the vertical axis. Values below −120 dBFS are pinned to the chart floor for display.
Current source occurrences
macOS VoiceOver event sounds v26.6.1
UI feedback
Alert.aiff
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:27Z
Technical metadata
| SHA-256 | a16d826ba22974a2fae9f8fd076bd2d753d91b29f078f1beb814b4fb084ba5bf |
|---|---|
| Analyzed | 2026-08-09T06:27:21Z |
| Codec | PCM signed 16-bit big-endian |
| Sample format | s16 · 16 bit |
| Sample rate | 22050 Hz |
| Channels | 2 |
| Analysis profile | notification-sound-db-bs1770-v2 |
| FFmpeg | ffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers |