Main Page | See live article | Alphabetical index Also called a Tartini tone, a combination tone is a usually lower pitch produced inside the inner ear by the presence of two external pitches. The frequency of the most commonly heard combination tone is the difference between the frequencies of the two pitches, , if is the higher frequency. Though much less common the following frequencies may also be heard: This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.