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

b3_teams_urgent_notification_r4_escalate

07a76488ef36

Level measurements

Integrated-14.3 LUFS
Maximum momentary-12.4 LUFS
True peak-7.2 dBTP
RMS-18.4 dBFS
Active RMS-17.6 dBFS
Duration2.247 s
Maximum short-term—
Loudness range—
Sample peak-7.3 dBFS
Sample crest factor11.1 dB
True-peak crest factor11.2 dB
Active duration1.870 s

Level over time

RMS · 10.0 ms · 225 points

Active threshold -51.2 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 0.56 1.12 1.69 2.25 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 centroid1148 Hz
Peak frequency915 Hz
200 Hz–8 kHz energy99.8 %
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: -86.8 dBFS 31.5 Hz: -85.7 dBFS 40.0 Hz: -84.6 dBFS 50.0 Hz: -82.7 dBFS 63.0 Hz: -81.3 dBFS 80.0 Hz: -83.4 dBFS 100.0 Hz: -83.2 dBFS 125.0 Hz: -78.8 dBFS 160.0 Hz: -75.5 dBFS 200.0 Hz: -56.2 dBFS 250.0 Hz: -41.6 dBFS 315.0 Hz: -38.5 dBFS 400.0 Hz: -35.8 dBFS 500.0 Hz: -36.4 dBFS 630.0 Hz: -25.5 dBFS 800.0 Hz: -38.1 dBFS 1000.0 Hz: -21.1 dBFS 1250.0 Hz: -45.5 dBFS 1600.0 Hz: -32.2 dBFS 2000.0 Hz: -31.7 dBFS 2500.0 Hz: -30.5 dBFS 3150.0 Hz: -34.4 dBFS 4000.0 Hz: -45.8 dBFS 5000.0 Hz: -40.4 dBFS 6300.0 Hz: -41.1 dBFS 8000.0 Hz: -46.6 dBFS 10000.0 Hz: -53.5 dBFS 12500.0 Hz: -56.1 dBFS 16000.0 Hz: -57.9 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

Microsoft Teams v26198.202.4929.7171

Message

Contents/Resources/b3_teams_urgent_notification_r4_escalate.wav
Acquisition
official_distribution
Source observed
2026-08-09T06:29:46Z
Distribution package
URL ↗
Package SHA-256
dd5fab62b2003993a49ac86ecdc653500e970e29efd8c8b100f17d0adb30987e
Official source ↗

Technical metadata

SHA-25607a76488ef36a7777db94f4881f3633854eb6ec6993d0b235debcd5565f08676
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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