Every vowel has 5 tones in mandarin, level tone ( ˉ ), the rising tone ( ˊ ), the falling-rising tone ( ˇ ), the falling tone ( ˋ ) , and the light tone( ), for instance: ā á ǎ à a ō ó ǒ ò o ē é ě è e, it's 声调 高音？ It's hard to say, we don't learn 高音 or 低音 at school, it's depends on what you mean, I think English also has 高音 when you shout out angrily....

音高：it's the pitch, the change of your sound, can decide whether your sound is high or low, every languages and every sound has it. 声调： it's the change of pitch, we use it to get different sound so that can indicate different meaning, normally, only Sino-Tibetan languages have it. these two have some relationship we have 4 tones in Mandarin, let's make example with them 1st tone, like ā, the sound is high and stable when you read it, the pitch is almost 5-5 （ā 声调：1声；音高：5-5） 2nd tone, like á，your sound get raising while reading, the pitch is near 3-5 （á 声调：2声；音高：3-5） 3rd tone，like ǎ, your sound get down and get up again, the pitch is about 2-1-4（ǎ 声调：3声；音高：2-1-4） 4th tone，like à, your sound get down quickly, the pitch is about 5-1（à 声调：4声；音高5-1） all the pitchs are relative pitchs, we just take it to show the difference of sound, we make all the sound from 1 to 5

高音is a high pitch 声调is a tone A tone can include only one pitch or change from one pitch to another. Ex. The first tone of Chinese pronounciation is steady with a high pitch, whereas the second tone starts from a middle pitch and rises up to a higher pitch.

Not the same.声调 often used in pinyin,高音 is a method of singing.