# Is sound vibration height the same as saying sound vibration speed?

In a music book explaining the physics of sound he says exactly this:

Page 12, Teoria da Música 5a Ed., Bohumil Med

Height - Denoted by the frequency of vibrations, that is, their speed. The higher the vibration speed, the acuter the sound. The unit of frequency per second is called Hertz (Hz).

When he says velocity I immediately associate the word "velocity" with the equation $$v =λf$$, but since the velocity of sound in air is constant to the same pressure and temperature conditions (which is the case of the medium where a musical note is produced) it does not It makes sense to speak of speed differences depending on the vibration, because if the vibration automatically increases, the wavelength drops, and in the end the speed of sound will always be the same... So, this is my question: does it make sense to attribute the word "velocity" to the concept of vibration? Is sound vibration height the same as saying sound vibration speed?

• That vibrations may occur faster or slower is clear. The author says "vibration speed" not speed of the wave. But all seems a bit redundant. Commented Sep 15, 2021 at 12:41
• Either the author or the translator has a terrible grasp of language. I might rewrite as "Pitch - denoted by vibration frequency, that is, the number of cycles per second. The greater the frequency, the "higher" the pitch sounds to our ear" Commented Sep 15, 2021 at 13:31