|
Decibel is |
|||
|
(a) |
a sound apparatus |
(b) |
a sound tone |
|
(c) |
the unit of intensity of sound |
(d) |
the wavelength of noise |
|
Decibel is |
|||
|
(a) |
a sound apparatus |
(b) |
a sound tone |
|
(c) |
the unit of intensity of sound |
(d) |
the wavelength of noise |