macOS CoreAudio event sounds · UI feedback
busy_tone_cept
151d6aa6ac17
Level measurements
Integrated-23.2 LUFS
Maximum momentary-21.7 LUFS
True peak-18.0 dBTP
RMS-24.0 dBFS
Active RMS-21.0 dBFS
Duration1.000 s
| Maximum short-term | — |
|---|---|
| Loudness range | — |
| Sample peak | -18.0 dBFS |
| Sample crest factor | 6.0 dB |
| True-peak crest factor | 6.0 dB |
| Active duration | 0.500 s |
Level over time
RMS · 10.0 ms · 100 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 centroid425 Hz
Peak frequency420 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 CoreAudio event sounds v26.6.1
UI feedback
telephony/busy_tone_cept.caf
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:20Z
macOS telephony event sounds v26.6.1
Call state
busy_tone_cept.caf
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:21Z
Technical metadata
| SHA-256 | 151d6aa6ac1735394749f87fc8b31599b332e93963bcb27e8d8427cebf940011 |
|---|---|
| Analyzed | 2026-08-09T06:27:19Z |
| 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 |