Sound Spectrum Analyzer

Choose an analysis method below.

Disclaimer: This tool provides a visualization of sound frequencies. It is not intended for professional acoustic analysis.

Low Frequencies
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Mid Frequencies
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High Frequencies
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How to Use the Sound Spectrum Analyzer

This tool helps you visualize sound by breaking it down into its individual frequencies. Here's how to use it:

  1. Start Analysis: Choose between "Start Mic Analysis" to use your device's microphone or "Upload Audio File" to select a file from your computer.
  2. Grant Permission: For microphone analysis, your browser will ask for microphone access. This is necessary for the tool to "listen" to the sound around you. No audio is ever recorded or stored.
  3. See the Spectrum: The canvas will show a bar graph representing different sound frequencies. Lower frequencies (bass) are on the left, and higher frequencies (treble) are on the right. The height of each bar indicates the loudness of that specific frequency band.

Frequently Asked Questions (FAQ)

What is a sound spectrum?

A sound spectrum is a graph that shows the different frequencies present in a sound and their corresponding intensities (volumes). Every sound, from a human voice to a musical instrument, is made up of a unique combination of frequencies. This analyzer provides a visual "fingerprint" of the sounds in your environment.

What do the different frequency bands represent?

The frequencies are measured in Hertz ($Hz$). A human ear can typically hear sounds between 20 Hz and 20,000 Hz (or 20 kHz). Here's a simplified breakdown:

  • Low Frequencies (20 Hz - 250 Hz): This is the bass and sub-bass range. Sounds like a bass drum, the rumble of a car engine, or the low notes on a piano.
  • Mid Frequencies (250 Hz - 4,000 Hz): This is where most human speech and musical instruments fall. This range is crucial for a sound's clarity.
  • High Frequencies (4,000 Hz - 20,000 Hz):** This range contains the high notes and harmonics, such as cymbals, the hiss of air, and birds chirping. It gives sound its "sparkle" and detail.

Is my audio being recorded or stored?

Absolutely not. Your privacy is paramount. All audio processing is done directly in your browser on your own device. The audio data is analyzed in real-time and then immediately discarded. Nothing is ever sent to or stored on our servers.

Advanced Features of the noisemeter.co Analyzer

Our goal is to help you truly understand the audio around you. That's why we've added a few more tools that professional sound engineers use every day. Don't worry, we've kept them simple and easy to use.

What are RMS and Peak levels?

Think of **Peak** as the absolute loudest moment of a sound—that single, instantaneous spike. It’s a very fast measurement that tells you the maximum a sound can get without distortion. **RMS (Root Mean Square)**, on the other hand, is a much better measure of a sound's overall or average loudness. It gives you a sense of the sound's "power" over a short period. This is the value that's often more useful for understanding a sound's true intensity. We also included a **clipping indicator** that lights up when the signal gets too loud, a handy visual warning.

Understanding Stereo with Mid/Side Analysis

When you hear sound from two speakers, what you're actually hearing is a combination of information that is the same in both speakers and information that is different. This is called Mid/Side analysis. The **Mid** channel is the mono part of the signal—the information that is identical in both the left and right channels. The **Side** channel is the stereo information—the parts that are different between the two. By switching to Mid/Side view, you can see these two parts of your audio signal separately. This is a powerful way to check for issues like phasing and to see how wide your audio actually is.

Why isn't this a full-featured DAW?

While our tool includes many powerful features, it's designed to be a simple, accessible online analyzer. Features like EBU R128 loudness metering and multi-channel routing require complex, multi-threaded processing that's best handled by professional desktop software. We've focused on giving you the core tools you need to understand your sound, all without having to install anything or pay a dime.