Dolphin tone is a musical term usually used to describe a high-pitched, bright, pure tone, similar to the sound made by dolphins. In literary descriptions, dolphin sounds are often given highly expressive and infectious adjectives to demonstrate their graceful, ethereal and elusive qualities. The following are some words and expressions that may be used to describe dolphin sounds:

1. Clear and transparent: The timbre of dolphin sounds is pure and bright, like clear and transparent spring water, making people feel fresh and pure.

2. Melodious and melodious: The melody of dolphin sound is beautiful and melodious, with a pleasant quality that seems to soothe people's hearts.

3. Mellow and sweet: The tone of dolphin sound is soft and melodious, with a delicate rhythm that makes people immersed in it.

4. Delicate and moving: The sound quality of Dolphin Sound is soft, delicate and full of emotion, making people feel the charm of music.

5. Elegant and free: The notes of dolphin sound are like elegant and free elves, light and graceful, making people feel like they are in a fairyland.

6. Affectionate and moving: The emotions expressed by dolphin sounds are deep and moving, and can arouse people's screams and emotions.

7. Ethereal and beautiful: Dolphin sounds are sometimes like sounds of nature, with a mysterious quality that makes people feel an otherworldly atmosphere.

8. Free and unrestrained: The melody of dolphin music is free and unrestrained, just like dolphins swimming freely in the ocean, giving people a feeling of freedom and vitality.

The above are some possible descriptive words and expressions. I hope they can provide you with some inspiration and reference.