An animal that can hear sounds with low frequency than human ear is

  • whale
  • pigeon
  • snake
  • dog

In air, change in pressure produces

  • sound waves
  • vibrations
  • light waves
  • thermal energy

The medical use of ultrasound is to detect

  • baby
  • cancer cells
  • infected parts of the body
  • damaged organs

The exact speed of sound depends upon

  • pressure
  • temperature
  • density
  • mass

The wave with compressions and rarefactions is known as

  • transverse waves
  • longitudinal waves
  • latitudinal waves
  • horizontal waves

Ships use echolocation to measure the

  • size of fish
  • density of water
  • depth of water
  • area of ocean

An example of 'percussion' is

  • flute
  • piano
  • drum
  • saxophone

The louder the sound, the more

  • the wave front
  • the wavelength
  • the energy
  • the frequency

Unwanted or unpleasant sounds are known as

  • music
  • noise
  • laugh
  • yawn

Some whales produce songs that travel for about

  • 1 kilometer
  • 2 kilometers
  • 50 kilometers
  • 100 kilometers

In air, the speed of sound is

  • 3000 m/s
  • 300 m/s
  • 3300 m/s
  • 330 m/s

Bats use ultrasound to find its

  • home
  • predator
  • prey
  • baby

The loudness of sound depends on

  • wave front
  • frequency
  • amplitude
  • wavelength

Bats also use 'ultrasound' to prevent

  • predators
  • homes
  • preys
  • obstacles

The louder the sound is, the more the amplitude it

  • can
  • will
  • is
  • has

The full name of ultrasound is

  • ultra high sounds
  • ultra pitch sounds
  • ultrasonic sounds
  • ultraviolet sounds

The melting of a metal with the help of ultrasounds is known as

  • ultra welding
  • ultrasonic welding
  • ultrasound welding
  • ultraviolet welding

The thing which also effects the sound produced by vibrating strings, is

  • tension of strings
  • mass of strings
  • angle of strings
  • material of strings

The number of things that effect the sound produced by vibrating strings is

  • 1
  • 2
  • 3
  • 4

When air vibrates in a short thin tube, the level of note is

  • low
  • high
  • high pitched
  • low pitched

A wave with ups and downs is known as

  • transverse wave
  • longitudinal wave
  • latitudinal wave
  • horizontal wave

The rock concerts have sound level up to

  • 80 dB
  • 100 dB
  • 120 dB
  • 140 dB

Two similar string instruments are

  • piano and guitar
  • piano and violin
  • guitar and violin
  • harp and piano

Notes are put together to produce a pleasing sound known as

  • noise
  • pitch
  • music
  • phase

Sounds with a high frequency which a human ear can detect are known as

  • infrasound
  • ultrasounds
  • high sounds
  • low sounds

When the hand bell stimulates air particles,

  • temperature increases
  • pressure increases in the air
  • both temperature and pressure decreases in the air
  • humidity of air keeps on increasing and decreasing

To avoid noise from the surroundings

  • soft curtains should be used
  • hard curtains should be used
  • glass windows should be used
  • vacuum windows should be used

In water the speed of sound is

  • 100 m/s
  • 200 m/s
  • 1500 m/s
  • 2000 m/s

The number of sound waves sent per second is known as

  • wave front
  • wavelength
  • frequency
  • amplitude

Sound travels faster in liquids than air because

  • liquid is more dense
  • the particles in liquid are close
  • the particles in liquids have less energy
  • the particles in liquids collide less as compare to particles in air
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