macOS telephony event sounds · Incoming call
ringback_tone_hk
941fc87b65c2
Level measurements
Integrated-20.5 LUFS
Maximum momentary-18.7 LUFS
True peak-12.0 dBTP
RMS-25.0 dBFS
Active RMS-19.0 dBFS
Duration4.000 s
| Maximum short-term | -24.4 LUFS |
|---|---|
| Loudness range | 9.0 LU |
| Sample peak | -12.0 dBFS |
| Sample crest factor | 13.0 dB |
| True-peak crest factor | 13.0 dB |
| Active duration | 1.000 s |
Level over time
RMS · 10.0 ms · 400 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 centroid460 Hz
Peak frequency441 Hz
200 Hz–8 kHz energy99.9 %
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 telephony event sounds v26.6.1
Incoming call
ringback_tone_hk.caf
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:21Z
Technical metadata
| SHA-256 | 941fc87b65c2f2747b532b66e7c9c2af5f14e7489d7a7c106a89394401ce1596 |
|---|---|
| Analyzed | 2026-08-09T06:27:20Z |
| Codec | PCM signed 16-bit little-endian |
| Sample format | s16 · 16 bit |
| Sample rate | 44100 Hz |
| Channels | 1 |
| Analysis profile | notification-sound-db-bs1770-v2 |
| FFmpeg | ffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers |