Dear Students
Note down some examples from your real-life applications where different sounds are heard. Also, explain the difference between the types of sound produced.
Answers
What are the musical sounds?
We find certain sounds pleasant and associate them with music. In a musical sound, there are a number of frequencies present in a definite ratio or relation to each other. Broadly, musical instruments are classified into the following three categories.
In stringed instruments like violin, guitar, and sitar, sound is produced by a vibrating string. The shrillness or pitch of the sound is altered by changing the length of the vibrating portion of the string. For example, a sitar player plucks the string with the right hand while the pitch of the sound produced is changed by pressing the string with the index finger of the left hand. These instruments also have an air chamber, which helps increase the loudness of the sound produced.
ANSWER...
- Ultrasound waves are used to detect objects. A ringing telephone, a honking horn, and the sound of a friend's voice are all reminders of how important sound is. But sound has uses that go beyond communication. For example, some animals and people use reflected ultrasound waves to detect objects