In which instruments Helmholtz resonators also important?
1.Stringed
2.Woodwind
3.Brass
4.Keyboard
As sound requires a medium, it cannot travel through which of the following?
1.Glass
2.Air
3.Vacuum
4.Water
At what sound pressure is the pain felt?
1.53 Pa
2.63 Pa
3.73 Pa
4.103 Pa
By which formula the resonant frequency is determined?
1.f = c/2π√B/VS Hz
2.f = c/5π√A/VL Hz
3.f = c/2π√A/VL Hz
4.f = c/3π√A/VS Hz
How do sound waves travel from the point of source?
1.Spherical waves
2.Oval waves
3.Sinewaves
4.Cos waves
How many bones does middle ear have?
1.1
2. 2
3. 3
4.4
How many set of frequencies comprise the spectrum?
1.1
2.2
3.3
4.4
How much phons is equal to 1 sone?
1.10
2.20
3.30
4.40
How much times greater is the threshold of pain corresponding to pressure amplitude of the atmospheric pressure?
1.10 million
2.1 billion
3.1 trillion
4.1 million
Two sounds have levels of 80 dB and 100 dB. What is the difference in sound intensities?
1.50
2.100
3.200
4.1000
What can be expressed as distance travelled in one second?
1.Phase
2.Velocity
3.Period
4.Wavelength
What can be termed as frequencies higher than the fundamental frequencies?
1.Overtones
2.Timbre
3.Pitch
4.Frequency
What can be termed as the intensity of compressions and rarefaction produced in the medium?
1.Frequency
2.Cycle
3.Wavelength
4.Amplitude
What can be termed as the sensation of a frequency?
1.Interval
2.Octaves
3.Harmonic
4.Pitch
What can occur when the speed of a wave changes, as it moves from one environment to another?
1.Reflection
2.Diffraction
3.Frequency
4.Refraction
What causes reverberation?
1.Diffraction
2.Frequency
3.Reflection
4. Refraction
What does the bones in the ear act like?
1.Audio amplifier
2.Video amplifier
3.Radio amplifier
4.Ultrasonic amplifier
What is called as the sound power per unit area?
1.Sound intensity
2.Sound pressure
3.Sound amplitude
4.Sound velocity
What is caused by bending across obstacles in sound waves?
1.Diffraction
2.Reflection
3.Frequency
4.Refraction
What is disturbed at the opening of Helmholtz resonator that bounces like a mass on a spring in simple harmonic motion which creates sound?
1.Air
2.Water
3.Sound
4. Frequency
What is termed as a pattern which repeats itself over time?
1.Wavelength
2.Frequency
3.Amplitude
4.Periodic Vibration
What is termed as one repetition of the pattern?
1.Velocity
2.Cycle
3.Frequency
4. Wavelength
What is termed as the amount of sound energy that is reflected off a surface?
1.Reflection
2.Refraction
3.Diffraction
4.Frequency
What is termed as time required to complete one cycle of vibration?
1.Amplitude
2. Wavelength
3.Period
4.Cycle
What is the dimension of sound waves in the real world?
1.One-dimensional
2.Two-dimensional
3.Three-dimensional
4.Four-dimensional
What is the effect called in which each single molecule only moves a small distance as it vibrates, and it causes the nearby molecules to vibrate all the way to the ear?
1.Spectral effect
2.Dynamic effect
3.Domino effect
4.Modulation effect
What is the full form of Hi – Fi?
1.Highest fidelity
2.High fidelity
3. Huge fidelity
4.High frequency
What is the full form of SPL?
1.Signal Pressure Level
2.Sound Pressure Level
3.Signal Phase Level
4. Sound Periodic Level
What is the interval between 400 Hz and 100 Hz?
1.4
2.16
3.40,000
4.128
What is the newer unit of loudness and is now the international standard?
1.Phon
2.Sone
3.Decibel
4.Frequency
What is the required frequency range for Hi-Fi programs?
1.80 Hz to 5 KHz
2.40 Hz to 15 KHz
3.60 Hz to 55 KHz
4.8 Hz to 66 KHz
What is the required frequency range for normal entertainment programs?
1.80 Hz to 5 KHz
2.40 Hz to 15 KHz
3.60 Hz to 55 KHz
4.8 Hz to 66 KHz
What is the sound motion curves called?
1.Frequency
2.Cycle
3.Overtone
4.Waveform
What is the standard pitch of a human ear?
1.220 Hz
2.600 Hz
3.20 Hz
4.440 Hz
What is the unit of loudness level for pure tone?
1.Decibel
2.Velocity
3.Phon
4.Wavelength
What is the velocity at 0° C?
1.331 m/s
2. 339 m/s
3. 351 m/s
4.431 m/s
What makes two musical instruments sound different when they are playing the same note?
1.Overtones
2.Timbre
3.Frequency
4.Pitch
Which age group of people can hear the frequencies above 20,000 Hz?
1.70-80 years
2.65-75 years
3.Young
4.55-65 years
Which audio frequencies have smaller wavelength and suffer less diffraction?
1.Low
2.High
3.Medium
4.Low and High
Which change is insensitive to a human ear?
1.Phase
2.Velocity
3.Timbre
4.Overtones
Which is one of the most common applications of Helmholtz resonator?
1.Woofer
2.Subwoofer
3.Reflection
4. Diffraction
Which of the following has all the characteristics of a wave like amplitude, frequency, wavelength, phase and velocity?
1.Sound
2.Intensity
3.Air
4.Energy
Which of the following is the fluid-filled tube present in the inner ear?
1.Cochlea
2.Pinna
3.Auditory nerve
4.Fallopian
Which of the following sounds are considered harmonic?
1.Thunder and splattering of rain
2.Flute and trumpet
3.Thunder and trumpet
4.Thunder and saxophone
Which of the following sounds are considered inharmonic?
1.Thunder and splattering of rain
2.Thunder and trumpet
3.Saxophone and trumpet
4.Trumpet and flute
Which resonant frequencies can be obtained with Helmholtz resonator?
1.Low
2.High
3.Medium
4.Low and High
Which resonator is a container/bottle of gas with an open hole?
1.Helmholtz
2.Coaxial
3.Dielectric
4.Crystal
Which scale is often convenient to measure sound pressures on a logarithmic scale?
1.Amplitude
2.Decibel
3.Threshold
4.Temperature
Which sounds are generally pitched regarding human speech?
1.Vowels
2. Consonants
3. Amplitude
4.Resonant
Who is capable of detecting a difference in frequency between two separate sounds that is as little as 2 Hz?
1.Young
2.Old
3.Musically trained
4.Infants