Explore topic-wise InterviewSolutions in .

Device for ADJUSTING the frequency response of an AUDIO frequency amplifier so as to compensate for DEFICIENCIES in the audible output and therfore achieve a more PLEASING unit.

Device for adjusting the frequency response of an audio frequency amplifier so as to compensate for deficiencies in the audible output and therfore achieve a more pleasing unit.

The velocity with which SOUND WAVES travel in a medium. In air, its value is 332 m /s at 0 0 C and increases with TEMPERATURE. It is dependent of PRESSURE. Its value is more in liquids and maximum in solids. 

The velocity with which sound waves travel in a medium. In air, its value is 332 m /s at 0 0 C and increases with temperature. It is dependent of pressure. Its value is more in liquids and maximum in solids. 

A METHOD of locating underwater objects by transmitting a high FREQUENCY SOUND pulse and detecting or receiving it after it is reflected from object. The method can be used to determine the depth of water at a LOCATION. The apparatus used is known as echo sounder.

A method of locating underwater objects by transmitting a high frequency sound pulse and detecting or receiving it after it is reflected from object. The method can be used to determine the depth of water at a location. The apparatus used is known as echo sounder.

This refers to PERSISTENCE of sound even after the SOURCE is not EMITTING any sound.

This refers to persistence of sound even after the source is not emitting any sound.

The PLEASING effect on the ear PRODUCED when TWO notes that PRODUCE concord are sounded one after the other.

The pleasing effect on the ear produced when two notes that produce concord are sounded one after the other.

An OSCILLATOR having HIGH inherent frequency stability, used to establish the carrier frequency in RADIO TRANSMISSION. 

An oscillator having high inherent frequency stability, used to establish the carrier frequency in radio transmission. 

The sensation PRODUCED by a source of sound to a LISTENER. It depends on the intensity of sound for a GIVEN frequency. It ALSO depends on the frequency of the sound.

The sensation produced by a source of sound to a listener. It depends on the intensity of sound for a given frequency. It also depends on the frequency of the sound.

In communication a specified band of frequencies, or a particular PATH, USED in the transmission and reception of electric SIGNALS.

In communication a specified band of frequencies, or a particular path, used in the transmission and reception of electric signals.

REFERS tot he study of the production and properties of sounds. It is also USED to describe the way in which sound ID REPRODUCED in PRACTICAL situtaions. 

Refers tot he study of the production and properties of sounds. It is also used to describe the way in which sound id reproduced in practical situtaions. 

A SYNTHESIZER is a MUSICAL instrument used to MAKE sounds electronically.

A synthesizer is a musical instrument used to make sounds electronically.

THOMAS ALVA EDISON in 1877

Thomas Alva Edison in 1877

They are used to collect and concentrate sound. They MADE it possible to record LOW LEVEL sounds such as bird’s SONG.

They are used to collect and concentrate sound. They made it possible to record low level sounds such as bird’s song.

Because of the BOUNDARY conditions a vibrating SYSTEM can oscillate only in some special patterns which are CALLED the normal modes.

Because of the boundary conditions a vibrating system can oscillate only in some special patterns which are called the normal modes.

This states that the RESULTANT displacement at any point is the sum of the SEPARATE displacements due to the TWO waves of sound. 

This states that the resultant displacement at any point is the sum of the separate displacements due to the two waves of sound. 

The PROPERTY which enables the ear to distinguish between TWO SOUNDS ( having same pitch and loudness ) from two different instruments is CALLED quality.

The property which enables the ear to distinguish between two sounds ( having same pitch and loudness ) from two different instruments is called quality.

It is quantity with the help of which we can distinguish two sound of same loudness but having different FREQUENCIES. The PITCH of the sound is determined by the frequency of the vibrating which PRODUCES sound.

It is quantity with the help of which we can distinguish two sound of same loudness but having different frequencies. The pitch of the sound is determined by the frequency of the vibrating which produces sound.

It depends upon the amplitude of the SOUND WAVE. The GREATER is the amplitude, the greater is the loudness of the sound. Loudness is MEASURED in terms of the energycarried by sound WAVES.

It depends upon the amplitude of the sound wave. The greater is the amplitude, the greater is the loudness of the sound. Loudness is measured in terms of the energycarried by sound waves.

The THREE CHARACTERISTICS are:

1.  LOUNDNESS
2.  PITCH
3.  QUANTITY

The three characteristics are:

A noise is produced by non - periodic VIBRATIONS. Their wave functions are non periodic and have no definite REGULARITIES. The wave functions cannot be DECOMPOSED into harmonic components.

A noise is produced by non - periodic vibrations. Their wave functions are non periodic and have no definite regularities. The wave functions cannot be decomposed into harmonic components.

Musical sound is produced by periodic VIBRATIONS. The WAVE functions of musical sounds are periodic functions. THEREFORE musical sounds can be DECOMPOSED into harmonic COMPONENTS.

Musical sound is produced by periodic vibrations. The wave functions of musical sounds are periodic functions. Therefore musical sounds can be decomposed into harmonic components.

If there is arelative MOTION between a source of sound and the observer, the apparent PITCH APPEARS to be different than the true frequency of the source of sound. This is CALLED doppler effect.

If there is arelative motion between a source of sound and the observer, the apparent pitch appears to be different than the true frequency of the source of sound. This is called doppler effect.

According to the principle of SUPERPOSITION a STRETCHED string tied at both ends can vibrate simultaneously in more than one mode. Which mode is strongly EXCITED depends on where the string is plucked or bowed. Musical instruments like the sitar and the violin are designed on this principle.

According to the principle of superposition a stretched string tied at both ends can vibrate simultaneously in more than one mode. Which mode is strongly excited depends on where the string is plucked or bowed. Musical instruments like the sitar and the violin are designed on this principle.

Whenever a wave TRAVELLING in a MEDIUM is obstructed by a hard SURFACE, it is bounded back into the same medium. The phenomenon is called REFLECTION of wave.

Whenever a wave travelling in a medium is obstructed by a hard surface, it is bounded back into the same medium. The phenomenon is called reflection of wave.

A periodic WAVE is one in which the particles, of the MEDIUM vibrate periodically while PROPAGATING the DISTRUBANCE.

A periodic wave is one in which the particles, of the medium vibrate periodically while propagating the distrubance.

If the BOUNDARY is not COMPLETELY rigid or is an interface between two different elastic media then a part of the incident wave is reflected and a part is transmittted into the second medium. If a wave pulse is incident OBLIQUELY on the boundary between two different media the transmitted wave is CALLED the refracted wave.

If the boundary is not completely rigid or is an interface between two different elastic media then a part of the incident wave is reflected and a part is transmittted into the second medium. If a wave pulse is incident obliquely on the boundary between two different media the transmitted wave is called the refracted wave.

When a COMPRESSION due to one WAVE FALLS on compression of the other or rarefaction of one wave falls on rarefaction of other, the resultant displacement is maximum. This is called constructive interference.

When a compression due to one wave falls on compression of the other or rarefaction of one wave falls on rarefaction of other, the resultant displacement is maximum. This is called constructive interference.

It is a technique of generating sound WAVES of very HIGH frequency as a means of defecting invisible SUBMARINE objects.

It is a technique of generating sound waves of very high frequency as a means of defecting invisible submarine objects.

It is VALID for both the types, i.e, for longitudinal WAVES as WELL as for transverse waves.

It is valid for both the types, i.e, for longitudinal waves as well as for transverse waves.

Propagation of SOUND WAVES in air is an example of longitudinal wave motion. When a sound pulse TRAVEL in air it CAUSES local changes in pressure and density of air which are CALLED condensations and rarefactions.

Propagation of sound waves in air is an example of longitudinal wave motion. When a sound pulse travel in air it causes local changes in pressure and density of air which are called condensations and rarefactions.

A WAVE motion in which the individual particles of the medium vibrate in a direction at RIGHT ANGLES to the direction of wave PROPAGATION, is called a TRANSVERSE wave motion.

A wave motion in which the individual particles of the medium vibrate in a direction at right angles to the direction of wave propagation, is called a transverse wave motion.

When TWO sounds OVERLAP, they cancel out each other. This METHOD is CALLED anti noise.

When two sounds overlap, they cancel out each other. This method is called anti noise.

German physicist Heinrich Hertz; the UNIT of FREQUENCY of LIGHT waves is NAMED after him.

German physicist Heinrich Hertz; the unit of frequency of light waves is named after him.

Constant

Constant

WHALES and DOLPHINS. 

Whales and dolphins. 

EARTH QUAKE and EXPLOSIONS.

Earth quake and explosions.

Increases

Increases

1500 MILES PER SECOND.

1500 miles per second.

It is the PROPERTY of a WAVE on which its INTENSITY DEPENDS.

It is the property of a wave on which its intensity depends.

INFRASONIC. 

Infrasonic. 

ERNEST MACH.

Ernest Mach.

ULTRA SONIC

Ultra sonic

340.29 m / s.

340.29 m / s.

It is SPEED of an OBJECT MOVING with a speed GREATER than that of SOUND.

It is speed of an object moving with a speed greater than that of sound.

AUDIO FREQUENCY is the frequency of audio SOUNDS. 

Audio frequency is the frequency of audio sounds. 

The NUMBER of VIBRATIONS made by a body in ONE SECOND is called its FREQUENCY.

The number of vibrations made by a body in one second is called its frequency.

It is SOUND of FREQUENY more than 20 KHZ ( 20,000 cycles / sec ) .

It is sound of frequeny more than 20 KHz ( 20,000 cycles / sec ) .

Very PAINFUL to WITHSTAND.

Very painful to withstand.

It is PRODUCED by REFLECTION of SOUND.

It is produced by reflection of sound.

LIGHT WAVE.

Light wave.

VELOCITY is EQUAL to FREQUENCY * WAVELENGTH.

Velocity is equal to frequency * wavelength.