Question

1. Fill in the blanks.
a. SI unit of frequency is ____.
b. The quality of a sound is also known as_____.
c._____is the unit for measuring the loudness of sound.​

Answer 1

Answer:

a. hertz(Hz)

b. timbre

c. decibels

Answer 2

Answers:

1. SI unit of frequency is $\underline {\mathcal {\red {Hertz\ (Hz)}}}$
2. The quality of sound is also known as $\underline {\mathcal {\pink {Timbre}}}$
3. $\underline {\mathcal {\orange {Decibel\ (dB)}}}$ is the unit for measuring the loudness of sound.

$\:$

More to know!:

Sound is produced by vibrating objects.

☆ Vibration is the rapid to and fro motion of an object.

Characteristics of vibrations are:

• Amplitude $\implies$ SI unit is metres (m).
• Frequency $\implies$ SI unit is Hertz (Hz) and is represented by the Greek letter nu (ν)
• Time period $\implies$ SI unit is seconds (s) and is represented by capital 't' (T).
• Wavelength $\implies$ SI unit is metres (m) and is represented by the Greek letter lamda (λ).

Characteristics of sound are:

• Quality or timbre
• Loudness
• Pitch
• Speed