sound waves

Sound originates from ..........bodies

• vibrating

• moving

• flying

Sound is considered from ....................... waves

• transverse

• longitudinal

• electromagnetic

Sound waves propagate through the medium as ........ of compressions and refractions

• cubes

• circles

• spheres

Ear plugs made of .......... are used to avoid the hazard effect of loud sounds

• silicon

• iron

• aluminum

Sharp tones have ......... frequencies, while rough tones have .......... frequencies.

• high / low

• low / high

• high / high

The velocity of sound through solids is .......................... than that through gases and its velocity through gases is ........ than that through liquids.

• higher / higher

• lower / higher

• higher / lower

Sound wave which propagates through air with velocity 340 m/sec. and of frequency 20 Hertz, its wavelength equals ............

• 1.7 m

• 17 m

• 0.17 m

The human ears can differentiate between the sounds through three different factors. which are sound ........ , ........... ,and .................. .

• pitch / intensity / type ( quality )

• pitch / intensity / frequency

• pitch / amplitude / type ( quality )

Sound of woman is ......... so it is said that she has ..........pitched sound.

• harsh / low

• sharp / low

• sharp / high

The sound of the electric bell is the highest when it is put under a bell jar evacuated from the air.

• true

• false