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| Link | Description |
| Online Loudness Meter | allows to estimate the volume of noises in the room or to analyze the volume of sounds in a recording file. |
| Voice Stress Test | tool analyzes the voice and determines a person’s stress level. |
| AHA Music | A very simple tool that helps you determine what track is playing in the current browser tab. What I like best about it is that it works when the sound is turned OFF (albeit with a slight delay) |
| MP3 Spectrum Analyzer |
