Notification Sound MeasurementsMeasured levels and spectral characteristics of current OS and app event sounds
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macOS VoiceOver event sounds · UI feedback

Collaboration

7bc52b0bc9f4

Level measurements

Integrated-39.5 LUFS
Maximum momentary-39.5 LUFS
True peak-15.8 dBTP
RMS-32.9 dBFS
Active RMS-28.9 dBFS
Duration0.025 s
Maximum short-term—
Loudness range—
Sample peak-16.6 dBFS
Sample crest factor16.3 dB
True-peak crest factor17.1 dB
Active duration0.010 s

Level over time

RMS · 10.0 ms · 3 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 0.000 0.006 0.013 0.019 0.025 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 centroid3322 Hz
Peak frequency1465 Hz
200 Hz–8 kHz energy92.9 %
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: -110.0 dBFS 31.5 Hz: -108.1 dBFS 40.0 Hz: -106.2 dBFS 50.0 Hz: -103.7 dBFS 63.0 Hz: -101.3 dBFS 80.0 Hz: -99.0 dBFS 100.0 Hz: -97.2 dBFS 125.0 Hz: -95.6 dBFS 160.0 Hz: -94.8 dBFS 200.0 Hz: -95.2 dBFS 250.0 Hz: -99.0 dBFS 315.0 Hz: -99.5 dBFS 400.0 Hz: -93.5 dBFS 500.0 Hz: -85.5 dBFS 630.0 Hz: -85.2 dBFS 800.0 Hz: -78.6 dBFS 1000.0 Hz: -77.2 dBFS 1250.0 Hz: -44.7 dBFS 1600.0 Hz: -39.9 dBFS 2000.0 Hz: -67.2 dBFS 2500.0 Hz: -67.2 dBFS 3150.0 Hz: -50.7 dBFS 4000.0 Hz: -49.7 dBFS 5000.0 Hz: -42.1 dBFS 6300.0 Hz: -50.7 dBFS 8000.0 Hz: -53.1 dBFS 10000.0 Hz: -51.0 dBFS 12500.0 Hz: -52.0 dBFS 16000.0 Hz: -55.6 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 VoiceOver event sounds v26.6.1

UI feedback

Collaboration.wav
Acquisition
local_installation
Source observed
2026-08-09T06:27:27Z
Official source ↗

Technical metadata

SHA-2567bc52b0bc9f4f9f26e3426aece25e9fd099c5563d691dacce398059db0010341
Analyzed2026-08-09T06:27:22Z
CodecPCM signed 16-bit little-endian
Sample formats16 · 16 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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