Notification Sound MeasurementsMeasured levels and spectral characteristics of current OS and app event sounds
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Microsoft Teams · Message

a4_teams_basic_notification_r4_tap

f819dd7c42ba

Level measurements

Integrated-27.0 LUFS
Maximum momentary-25.6 LUFS
True peak-9.7 dBTP
RMS-25.7 dBFS
Active RMS-22.6 dBFS
Duration0.245 s
Maximum short-term—
Loudness range—
Sample peak-9.7 dBFS
Sample crest factor16.0 dB
True-peak crest factor16.0 dB
Active duration0.120 s

Level over time

RMS · 10.0 ms · 25 points

Active threshold -58.0 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 0.061 0.122 0.183 0.245 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 centroid323 Hz
Peak frequency237 Hz
200 Hz–8 kHz energy91.3 %
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: -55.6 dBFS 31.5 Hz: -52.7 dBFS 40.0 Hz: -50.8 dBFS 50.0 Hz: -50.0 dBFS 63.0 Hz: -48.2 dBFS 80.0 Hz: -50.2 dBFS 100.0 Hz: -49.8 dBFS 125.0 Hz: -44.7 dBFS 160.0 Hz: -43.3 dBFS 200.0 Hz: -35.1 dBFS 250.0 Hz: -28.8 dBFS 315.0 Hz: -44.7 dBFS 400.0 Hz: -38.0 dBFS 500.0 Hz: -29.2 dBFS 630.0 Hz: -46.7 dBFS 800.0 Hz: -53.1 dBFS 1000.0 Hz: -58.7 dBFS 1250.0 Hz: -68.0 dBFS 1600.0 Hz: -71.2 dBFS 2000.0 Hz: -71.9 dBFS 2500.0 Hz: -72.9 dBFS 3150.0 Hz: -73.0 dBFS 4000.0 Hz: -69.3 dBFS 5000.0 Hz: -89.1 dBFS 6300.0 Hz: -89.5 dBFS 8000.0 Hz: -96.7 dBFS 10000.0 Hz: -97.1 dBFS 12500.0 Hz: -100.1 dBFS 16000.0 Hz: -96.5 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

Microsoft Teams v26198.202.4929.7171

Message

Contents/Resources/a4_teams_basic_notification_r4_tap.wav
Acquisition
official_distribution
Source observed
2026-08-09T06:29:46Z
Distribution package
URL ↗
Package SHA-256
dd5fab62b2003993a49ac86ecdc653500e970e29efd8c8b100f17d0adb30987e
Official source ↗

Technical metadata

SHA-256f819dd7c42ba17885996cdebcf6cd4bf675a9cddd8610b1d0d442bdcd3a46fd4
Analyzed2026-08-09T06:29:45Z
CodecAAC (Advanced Audio Coding)
Sample formatfltp
Sample rate44100 Hz
Channels2 · stereo
Analysis profilenotification-sound-db-bs1770-v2
FFmpegffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers

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