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

primary-notification-level50

a50f5280f96a

Level measurements

Integrated-16.8 LUFS
Maximum momentary-14.4 LUFS
True peak-8.0 dBTP
RMS-20.9 dBFS
Active RMS-20.6 dBFS
Duration1.297 s
Maximum short-term—
Loudness range—
Sample peak-8.0 dBFS
Sample crest factor12.9 dB
True-peak crest factor12.9 dB
Active duration1.200 s

Level over time

RMS · 10.0 ms · 130 points

Active threshold -53.5 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 0.32 0.65 0.97 1.30 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 centroid416 Hz
Peak frequency258 Hz
200 Hz–8 kHz energy99.5 %
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: -86.1 dBFS 31.5 Hz: -86.8 dBFS 40.0 Hz: -91.2 dBFS 50.0 Hz: -84.3 dBFS 63.0 Hz: -63.1 dBFS 80.0 Hz: -59.3 dBFS 100.0 Hz: -59.4 dBFS 125.0 Hz: -54.7 dBFS 160.0 Hz: -51.6 dBFS 200.0 Hz: -44.3 dBFS 250.0 Hz: -25.7 dBFS 315.0 Hz: -26.3 dBFS 400.0 Hz: -43.9 dBFS 500.0 Hz: -27.3 dBFS 630.0 Hz: -30.1 dBFS 800.0 Hz: -45.3 dBFS 1000.0 Hz: -38.7 dBFS 1250.0 Hz: -54.8 dBFS 1600.0 Hz: -60.0 dBFS 2000.0 Hz: -58.0 dBFS 2500.0 Hz: -59.3 dBFS 3150.0 Hz: -63.1 dBFS 4000.0 Hz: -60.9 dBFS 5000.0 Hz: -60.4 dBFS 6300.0 Hz: -59.3 dBFS 8000.0 Hz: -60.0 dBFS 10000.0 Hz: -66.4 dBFS 12500.0 Hz: -62.8 dBFS 16000.0 Hz: -67.8 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-level50.wav
Acquisition
official_distribution
Source observed
2026-08-09T06:29:46Z
Distribution package
URL ↗
Package SHA-256
dd5fab62b2003993a49ac86ecdc653500e970e29efd8c8b100f17d0adb30987e
Official source ↗

Technical metadata

SHA-256a50f5280f96a51eaa8753723c1589f51ec5fe451b29c1d1e172afa075ab1d788
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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