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

Volume Mount

f07cda78c1ee

Level measurements

Integrated-29.2 LUFS
Maximum momentary-27.2 LUFS
True peak-19.4 dBTP
RMS-33.1 dBFS
Active RMS-31.9 dBFS
Duration1.044 s
Maximum short-term—
Loudness range—
Sample peak-19.4 dBFS
Sample crest factor13.7 dB
True-peak crest factor13.7 dB
Active duration0.790 s

Level over time

RMS · 10.0 ms · 105 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 0.26 0.52 0.78 1.04 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 centroid339 Hz
Peak frequency328 Hz
200 Hz–8 kHz energy65.0 %
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: -78.2 dBFS 31.5 Hz: -70.4 dBFS 40.0 Hz: -70.0 dBFS 50.0 Hz: -70.0 dBFS 63.0 Hz: -77.3 dBFS 80.0 Hz: -72.4 dBFS 100.0 Hz: -75.0 dBFS 125.0 Hz: -43.6 dBFS 160.0 Hz: -66.4 dBFS 200.0 Hz: -59.2 dBFS 250.0 Hz: -56.8 dBFS 315.0 Hz: -37.1 dBFS 400.0 Hz: -60.2 dBFS 500.0 Hz: -60.1 dBFS 630.0 Hz: -48.6 dBFS 800.0 Hz: -68.5 dBFS 1000.0 Hz: -53.8 dBFS 1250.0 Hz: -69.7 dBFS 1600.0 Hz: -64.8 dBFS 2000.0 Hz: -62.4 dBFS 2500.0 Hz: -65.5 dBFS 3150.0 Hz: -65.9 dBFS 4000.0 Hz: -65.1 dBFS 5000.0 Hz: -64.0 dBFS 6300.0 Hz: -62.3 dBFS 8000.0 Hz: -60.2 dBFS 10000.0 Hz: -64.0 dBFS 12500.0 Hz: -76.4 dBFS 16000.0 Hz: -85.2 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 CoreAudio event sounds v26.6.1

UI feedback

system/Volume Mount.aif
Acquisition
local_installation
Source observed
2026-08-09T06:27:20Z
Official source ↗

Technical metadata

SHA-256f07cda78c1ee25c5ef048523b1498a2dd59e44afdedc81b0f61bda050992d0c4
Analyzed2026-08-09T06:27:19Z
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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