Sony 7 Using a sonogram, Displaying a sonogram, Displaying frequency and amplitude values, notes and statistics

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Using a sonogram

The sonogram is another way of displaying spectral data variations over time. In a sonogram, the horizontal axis represents time, and the vertical axis represents frequency.

Sonogram

The amplitude of each frequency component in the sonogram is represented by the color intensity of each point in the graph. This method of displaying spectral information is useful for identifying distinctive spectral patterns created from sounds such as speech, musical instruments, and ambient noise.

Displaying a sonogram

1.Open an audio file and select the portion of audio you want to analyze.

2.From the View menu, choose Spectrum Analysis. The Spectrum Analysis dialog appears.

3.Click the Sonogram button () to display your data as a sonogram.

4.Use the toolbar at the top of the window to set your other display options.

Tip: You can also click the Settings button ( ) in the

Spectrum Analysis window to set additional options.

If there is no selection in the waveform display window, the sonogram analyzes the sound data from the current cursor position to the end of the file.

Displaying frequency and amplitude values, notes and statistics

As you move the cursor through the sonogram, the amplitude and frequency values at the current position are displayed in a ToolTip next to the cursor and in the Statistics area at the bottom of the window:

Use the cursor to display amplitude and frequency values

Statistics area

CHP. 17 USING SPECTRUM ANALYSIS