Notification Sound MeasurementsMeasured levels and spectral characteristics of current OS and app event sounds
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macOS system sounds · System alert

Sosumi

f005fdc5ac36

Level measurements

Integrated-25.5 LUFS
Maximum momentary-24.6 LUFS
True peak-13.7 dBTP
RMS-33.2 dBFS
Active RMS-27.4 dBFS
Duration1.539 s
Maximum short-term—
Loudness range—
Sample peak-13.7 dBFS
Sample crest factor19.5 dB
True-peak crest factor19.5 dB
Active duration0.410 s

Level over time

RMS · 10.0 ms · 154 points

Active threshold -60.0 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 0.00 0.38 0.77 1.15 1.54 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 centroid771 Hz
Peak frequency785 Hz
200 Hz–8 kHz energy99.7 %
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: -86.7 dBFS 31.5 Hz: -83.3 dBFS 40.0 Hz: -81.4 dBFS 50.0 Hz: -79.3 dBFS 63.0 Hz: -78.9 dBFS 80.0 Hz: -73.4 dBFS 100.0 Hz: -76.9 dBFS 125.0 Hz: -69.2 dBFS 160.0 Hz: -65.3 dBFS 200.0 Hz: -64.3 dBFS 250.0 Hz: -63.7 dBFS 315.0 Hz: -65.7 dBFS 400.0 Hz: -63.0 dBFS 500.0 Hz: -54.5 dBFS 630.0 Hz: -39.0 dBFS 800.0 Hz: -35.4 dBFS 1000.0 Hz: -43.6 dBFS 1250.0 Hz: -54.3 dBFS 1600.0 Hz: -53.5 dBFS 2000.0 Hz: -59.4 dBFS 2500.0 Hz: -71.3 dBFS 3150.0 Hz: -75.2 dBFS 4000.0 Hz: -77.9 dBFS 5000.0 Hz: -80.8 dBFS 6300.0 Hz: -84.6 dBFS 8000.0 Hz: -90.7 dBFS 10000.0 Hz: -94.2 dBFS 12500.0 Hz: -94.9 dBFS 16000.0 Hz: -99.5 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 system sounds v26.6.1

System alert

Sosumi.aiff
Acquisition
local_installation
Source observed
2026-08-09T06:27:14Z
Official source ↗

Technical metadata

SHA-256f005fdc5ac36488d41891e04e9d66269db95af652b0c6b398fcdb0009f14308d
Analyzed2026-08-09T06:27:14Z
CodecPCM signed 24-bit big-endian
Sample formats32 · 24 bit
Sample rate48000 Hz
Channels2
Analysis profilenotification-sound-db-bs1770-v2
FFmpegffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers

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