A wind instrument, such as a bassoon, clarinet, flute, oboe, or saxophone, in which sound is produced by the vibration of reeds in or by the passing of air across the mouthpiece.

The wind instruments you've mentioned, including the bassoon, clarinet, flute, oboe, and saxophone, all fall under the category of "reed instruments" because they use reeds to produce sound. The reeds can be either single or double reeds.

To understand how these instruments produce sound, let's break down the process for each one:

1. Clarinet: The clarinet uses a single reed attached to the mouthpiece. When the player blows air through the space between the reed and the mouthpiece, the reed vibrates, producing sound. The player then uses their fingers to cover and uncover the instrument's tone holes, which alter the pitch of the sound.

2. Flute: Unlike the other instruments, the flute does not require reeds. It generates sound when the player blows air across the embouchure hole, located near the mouthpiece. This causes the air to vibrate, producing sound. Different pitches are achieved by covering and uncovering the tone holes along the length of the flute.

3. Oboe: The oboe uses a double reed, consisting of two reeds bound together and separated by a narrow opening. The player blows air through this opening, causing the reeds to vibrate against each other and produce sound. Similar to the clarinet, the player controls the pitch by covering and uncovering tone holes.

4. Bassoon: The bassoon also utilizes a double reed. The player blows air through the reeds, which are attached to a curved metal tube called a bocal. As the air passes through the reeds, they vibrate and produce sound. The player's fingers then cover and uncover tone holes to create different notes.

5. Saxophone: The saxophone uses a single reed, similar to the clarinet. The player blows air into the mouthpiece, causing the reed to vibrate and produce sound. By pressing different combinations of keys, the player can change the pitch and create a wide range of notes.

In summary, the vibrations of reeds or the passing of air across the mouthpiece are the mechanisms that produce sound in wind instruments like the bassoon, clarinet, flute, oboe, and saxophone. The specific design and type of reed used vary across these instruments, resulting in their distinctive sounds.