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

primary-notification-level20

fe8a9185007a

Level measurements

Integrated-31.9 LUFS
Maximum momentary-26.7 LUFS
True peak-14.9 dBTP
RMS-33.7 dBFS
Active RMS-33.0 dBFS
Duration1.228 s
Maximum short-term—
Loudness range—
Sample peak-14.9 dBFS
Sample crest factor18.8 dB
True-peak crest factor18.8 dB
Active duration1.040 s

Level over time

RMS · 10.0 ms · 123 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 0.31 0.61 0.92 1.23 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 centroid388 Hz
Peak frequency388 Hz
200 Hz–8 kHz energy99.9 %
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: -109.9 dBFS 31.5 Hz: -107.3 dBFS 40.0 Hz: -109.4 dBFS 50.0 Hz: -95.7 dBFS 63.0 Hz: -78.5 dBFS 80.0 Hz: -73.4 dBFS 100.0 Hz: -74.0 dBFS 125.0 Hz: -72.2 dBFS 160.0 Hz: -70.3 dBFS 200.0 Hz: -66.7 dBFS 250.0 Hz: -43.1 dBFS 315.0 Hz: -39.4 dBFS 400.0 Hz: -39.1 dBFS 500.0 Hz: -39.4 dBFS 630.0 Hz: -62.4 dBFS 800.0 Hz: -67.6 dBFS 1000.0 Hz: -71.6 dBFS 1250.0 Hz: -73.6 dBFS 1600.0 Hz: -78.9 dBFS 2000.0 Hz: -80.3 dBFS 2500.0 Hz: -82.9 dBFS 3150.0 Hz: -87.3 dBFS 4000.0 Hz: -90.8 dBFS 5000.0 Hz: -90.8 dBFS 6300.0 Hz: -73.3 dBFS 8000.0 Hz: -74.2 dBFS 10000.0 Hz: -89.8 dBFS 12500.0 Hz: -76.6 dBFS 16000.0 Hz: -95.1 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/primary-notification-level20.wav
Acquisition
official_distribution
Source observed
2026-08-09T06:29:46Z
Distribution package
URL ↗
Package SHA-256
dd5fab62b2003993a49ac86ecdc653500e970e29efd8c8b100f17d0adb30987e
Official source ↗

Technical metadata

SHA-256fe8a9185007a146290ea33f505ced047674628f2680946db24c6511d57d673a7
Analyzed2026-08-09T06:29:46Z
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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