| 1. | Again, la Cour made no claims of transmitting voice, only pure tones.
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| 2. | But to sing those songs with just pure tone is inartistic ."
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| 3. | There are two types of tones : pure tones and complex tones.
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| 4. | That's mostly been replaced by the pure tones of a CD player.
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| 5. | The 3100 Hz pure tone T-3 sound woke up 56 % of participants.
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| 6. | The left speaker suddenly begins to produce a sharp pure tone.
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| 7. | Violins, horns, harps _ their pure tones floated on the air.
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| 8. | It is easier to tune other instruments with this pure tone.
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| 9. | The song is an almost pure tone, modulated into chirps.
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| 10. | He never claimed or produced a device capable of transmitting speech, only pure tones.
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