Notification Sound MeasurementsMeasured levels and spectral characteristics of current OS and app event sounds
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macOS telephony event sounds · Call state

vc~ended

72c7af8db847

Level measurements

Integrated-16.0 LUFS
Maximum momentary-15.0 LUFS
True peak-6.0 dBTP
RMS-20.8 dBFS
Active RMS-19.7 dBFS
Duration0.900 s
Maximum short-term—
Loudness range—
Sample peak-6.0 dBFS
Sample crest factor14.8 dB
True-peak crest factor14.8 dB
Active duration0.700 s

Level over time

RMS · 10.0 ms · 90 points

Active threshold -51.9 dBFS
Short-window RMS level over time 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. 0 -20 -40 -60 -80 0.000 0.225 0.450 0.675 0.900 RMS (dBFS) Time (seconds)

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 centroid371 Hz
Peak frequency334 Hz
200 Hz–8 kHz energy99.5 %
Third-octave band energy 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. 0 -20 -40 -60 -80 -100 -120 31.5 63 125 250 500 1k 2k 4k 8k 16k 25.0 Hz: -64.5 dBFS 31.5 Hz: -59.0 dBFS 40.0 Hz: -55.6 dBFS 50.0 Hz: -58.7 dBFS 63.0 Hz: -61.3 dBFS 80.0 Hz: -65.3 dBFS 100.0 Hz: -59.9 dBFS 125.0 Hz: -51.8 dBFS 160.0 Hz: -52.2 dBFS 200.0 Hz: -53.0 dBFS 250.0 Hz: -54.5 dBFS 315.0 Hz: -24.3 dBFS 400.0 Hz: -26.0 dBFS 500.0 Hz: -33.8 dBFS 630.0 Hz: -58.7 dBFS 800.0 Hz: -50.8 dBFS 1000.0 Hz: -50.3 dBFS 1250.0 Hz: -63.3 dBFS 1600.0 Hz: -73.3 dBFS 2000.0 Hz: -89.3 dBFS 2500.0 Hz: -90.7 dBFS 3150.0 Hz: -101.2 dBFS 4000.0 Hz: -111.8 dBFS 5000.0 Hz: -114.3 dBFS 6300.0 Hz: -115.2 dBFS 8000.0 Hz: -114.7 dBFS 10000.0 Hz: -113.9 dBFS 12500.0 Hz: -112.8 dBFS 16000.0 Hz: -111.9 dBFS Band energy (dBFS) Frequency (Hz)

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

Call state

vc~ended.caf
Acquisition
local_installation
Source observed
2026-08-09T06:27:21Z
Official source ↗

Technical metadata

SHA-25672c7af8db847590c65a95c82ac0eea28c004fee49bccc19aa822314983d39428
Analyzed2026-08-09T06:27:21Z
CodecPCM signed 16-bit little-endian
Sample formats16 · 16 bit
Sample rate44100 Hz
Channels2
Analysis profilenotification-sound-db-bs1770-v2
FFmpegffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers

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