White and pink noise

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Most people have experienced this effect when washing dishes at their kitchen sink while trying to talk to someone in the next room. They can tell the other person is speaking, but it is difficult to understand exactly what is being said because the running water has raised the ambient level in their area.

When introducing a sound to a workplace, it is vital to ensure it is as comfortable and unobtrusive as possible. Otherwise, it risks becoming a source of irritation rather than a way to help solve an acoustic problem, as was the case with the original masking systems developed in the late 1960s, which used white noise generators.

Though the term ‘white noise’ still tends to be used interchangeably with ‘sound masking,’ it is a very different type of sound than what is produced by modern masking technologies.

White noise is a random broadband sound—meaning it includes a wide whatsapp number database range of frequencies—that typically spans the audible range of 20 to 20,000 hertz (Hz). Graphical representations of this type of noise vary depending on the horizontal axis. If it shows individual frequencies, volume is constant. However, if the scale is in octaves, each octave’s volume increases by three decibels (dB) because it contains double the number of frequencies than the one before it. As a general rule, the combined volume of any two sounds of equal volume is three dB higher. Thus, a graph depicting white noise shows either flat or increasing volume.