The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the suRead more
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the surfaces, preventing them from bouncing back and causing reverberation.
Dead Halls are crucial for conducting precise acoustic measurements, testing equipment, and conducting research where minimal acoustic interference is essential. They are used in industries such as aerospace, automotive, and telecommunications to simulate free-field conditions without environmental noise or reverberation.
The concept of a Dead Hall contrasts with conventional halls and auditoriums, which are designed to enhance sound reflection and create desirable reverberation effects for music performance and speech intelligibility. In a Dead Hall, the absence of reverberation ensures accurate acoustic measurements and controlled experimental conditions.
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surfRead more
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surface area, and the absorption coefficients of materials used in the room’s construction.
Sabine’s work revolutionized architectural acoustics by providing a quantitative method to predict and control reverberation characteristics in spaces. His formula is essential for designing auditoriums, concert halls, and other venues where optimal acoustics are critical for speech intelligibility, musical clarity, and overall sound quality.
While options [A] (Doppler), [B] (Newton), and [D] (Laplace) contributed significantly to various fields of science, Sabine’s contribution specifically addressed the acoustic properties of enclosed spaces, shaping modern architectural practices in acoustical design.
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By anRead more
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By analyzing the time delay and characteristics of these sound waves, sonar operators can determine the distance, size, and sometimes the composition of underwater objects.
Sonar finds extensive application in maritime industries, including naval operations for submarine detection, commercial shipping for navigation and collision avoidance, fisheries for locating fish shoals, and underwater mapping for geological and environmental surveys. Its ability to operate effectively in underwater environments where light and electromagnetic waves cannot propagate makes sonar indispensable for underwater exploration and navigation. Thus, navigators primarily use sonar to enhance safety and efficiency in maritime operations.
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient's body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and tranRead more
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient’s body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and transmitted to the listener’s ears.
Reflection of sound waves from the body’s internal organs allows healthcare providers to hear distinct sounds such as heartbeat rhythms, breathing patterns, and abnormal lung or bowel sounds. By focusing on capturing and transmitting these reflections effectively, the stethoscope aids in diagnosing medical conditions and monitoring patients’ health.
While refraction (option [B]), diffraction (option [C]), and polarization (option [D]) involve other properties of waves, reflection specifically enables the stethoscope to function as a critical tool in auscultation and medical examination. Thus, reflection of sound is essential to how a stethoscope operates.
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound aRead more
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound and its reflected echo.
The specific distance of 28 feet is based on the speed of sound in air (~343 meters per second or ~1125 feet per second at room temperature). Therefore, sound travels approximately 28 feet in 1/10 of a second, which is the minimum time interval typically required for a clear echo to be perceived by the human ear.
Understanding the distance for hearing echoes helps in practical applications such as acoustic design, outdoor activities, and safety in environments where sound reflection may affect communication and perception. Thus, the correct answer for hearing an echo is [C] 28 feet.
Sound waves produce echo primarily due to [C] reflection. When sound travels and encounters a sufficiently large and hard surface, such as a solid wall, mountain, or canyon wall, it reflects off the surface rather than passing through it or bending (refraction and diffraction). The reflection of souRead more
Sound waves produce echo primarily due to [C] reflection. When sound travels and encounters a sufficiently large and hard surface, such as a solid wall, mountain, or canyon wall, it reflects off the surface rather than passing through it or bending (refraction and diffraction).
The reflection of sound waves causes them to bounce back towards the source or in other directions, depending on the angle of incidence and the surface characteristics. If the distance to the reflecting surface is significant enough, the reflected sound waves return to the listener’s ears after a noticeable delay, creating the perceptible phenomenon known as an echo.
Understanding the process of reflection and its role in producing echoes is essential for designing spaces, conducting acoustic measurements, and studying sound propagation in various environments, from natural landscapes to built structures.
The effect of sound in the human ear, known as auditory persistence or the duration of the auditory sensation, lasts for approximately [B] 1/10 second. During this time, the auditory nerves continue to transmit signals to the brain after the sound stimulus has stopped, allowing for the perception ofRead more
The effect of sound in the human ear, known as auditory persistence or the duration of the auditory sensation, lasts for approximately [B] 1/10 second. During this time, the auditory nerves continue to transmit signals to the brain after the sound stimulus has stopped, allowing for the perception of sound even after it has ceased.
This phenomenon is crucial for understanding how humans perceive sound and process auditory information. Options [A] (1/5 second) and [C] (1/20 second) represent shorter durations that do not accurately reflect typical auditory persistence. Option [D] (1/2 second) exceeds the typical duration of auditory persistence, as sound effects are generally perceived for a shorter period in the absence of continuous stimulation.
Understanding auditory persistence helps in fields such as acoustics, psychology, and neurology, where the perception and processing of sound play critical roles in human behavior and communication.
The purpose of covering the walls, ceiling, and floor of a good auditorium with fibrous materials like carpet and glass fiber (option [D]) is to prevent echo by absorbing sound. Echoes occur when sound waves reflect off hard surfaces and bounce back, creating unwanted reverberation that can distortRead more
The purpose of covering the walls, ceiling, and floor of a good auditorium with fibrous materials like carpet and glass fiber (option [D]) is to prevent echo by absorbing sound. Echoes occur when sound waves reflect off hard surfaces and bounce back, creating unwanted reverberation that can distort speech and music.
By using sound-absorbing materials, such as acoustic panels, carpets, and fiberglass insulation, the auditorium reduces reverberation time. This improves the clarity of sound, enhances the music or speech intelligibility, and creates a more comfortable listening environment for the audience.
Additionally, these materials contribute to the overall acoustic design of the auditorium, ensuring that sound reflections are managed effectively. This acoustic treatment is essential in optimizing the auditory experience during concerts, performances, lectures, and other events held in the auditorium. Therefore, the correct answer is [D] to prevent echo by absorbing sound.
To hear an echo clearly, the time interval between the original sound and its reflected echo should be [C] more than 1/10 seconds. This time delay is necessary for the sound waves to travel to a reflecting surface and back, creating a perceptible gap between the original sound and its echo. If the tRead more
To hear an echo clearly, the time interval between the original sound and its reflected echo should be [C] more than 1/10 seconds. This time delay is necessary for the sound waves to travel to a reflecting surface and back, creating a perceptible gap between the original sound and its echo.
If the time interval is less than 1/10 seconds (option [B]), the reflected sound waves return too quickly to be distinguished as an echo. In contrast, a delay of more than 1/10 seconds (option [C]) allows for a noticeable echo effect. This phenomenon is crucial in acoustic environments where echoes contribute to the perceived spaciousness and quality of sound.
Understanding the appropriate time interval for echo perception helps in designing spaces where echoes enhance rather than distort sound clarity, such as concert halls and auditoriums.
The working system of radar is based on [B] reflection of radio waves. Radar operates by transmitting short pulses of radio waves from a radar antenna. These waves travel through the atmosphere until they encounter an object, such as an aircraft or ship. Upon hitting the object, some of the radio waRead more
The working system of radar is based on [B] reflection of radio waves. Radar operates by transmitting short pulses of radio waves from a radar antenna. These waves travel through the atmosphere until they encounter an object, such as an aircraft or ship. Upon hitting the object, some of the radio waves are reflected back towards the radar antenna.
The radar system then analyzes the time it takes for the radio waves to return (to determine distance), as well as any Doppler shift in frequency (to determine speed and direction of the object). This principle of radio wave reflection forms the basis of radar technology, which is crucial for applications in aviation, maritime navigation, weather forecasting, and military surveillance.
Options [A] (refraction of radio waves), [C] (Doppler effect), and [D] (Raman effect) are not directly related to the fundamental operation of radar systems, making [B] reflection of radio waves the correct answer.
The resonance time of Dead Hall is
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the suRead more
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the surfaces, preventing them from bouncing back and causing reverberation.
Dead Halls are crucial for conducting precise acoustic measurements, testing equipment, and conducting research where minimal acoustic interference is essential. They are used in industries such as aerospace, automotive, and telecommunications to simulate free-field conditions without environmental noise or reverberation.
The concept of a Dead Hall contrasts with conventional halls and auditoriums, which are designed to enhance sound reflection and create desirable reverberation effects for music performance and speech intelligibility. In a Dead Hall, the absence of reverberation ensures accurate acoustic measurements and controlled experimental conditions.
See lessThe relation between resonance time and volume of Hall has been propounded by
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surfRead more
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surface area, and the absorption coefficients of materials used in the room’s construction.
Sabine’s work revolutionized architectural acoustics by providing a quantitative method to predict and control reverberation characteristics in spaces. His formula is essential for designing auditoriums, concert halls, and other venues where optimal acoustics are critical for speech intelligibility, musical clarity, and overall sound quality.
While options [A] (Doppler), [B] (Newton), and [D] (Laplace) contributed significantly to various fields of science, Sabine’s contribution specifically addressed the acoustic properties of enclosed spaces, shaping modern architectural practices in acoustical design.
See lessSonar is mostly used in
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By anRead more
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By analyzing the time delay and characteristics of these sound waves, sonar operators can determine the distance, size, and sometimes the composition of underwater objects.
Sonar finds extensive application in maritime industries, including naval operations for submarine detection, commercial shipping for navigation and collision avoidance, fisheries for locating fish shoals, and underwater mapping for geological and environmental surveys. Its ability to operate effectively in underwater environments where light and electromagnetic waves cannot propagate makes sonar indispensable for underwater exploration and navigation. Thus, navigators primarily use sonar to enhance safety and efficiency in maritime operations.
See lessOn which principle of sound does the stethoscope work?
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient's body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and tranRead more
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient’s body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and transmitted to the listener’s ears.
Reflection of sound waves from the body’s internal organs allows healthcare providers to hear distinct sounds such as heartbeat rhythms, breathing patterns, and abnormal lung or bowel sounds. By focusing on capturing and transmitting these reflections effectively, the stethoscope aids in diagnosing medical conditions and monitoring patients’ health.
While refraction (option [B]), diffraction (option [C]), and polarization (option [D]) involve other properties of waves, reflection specifically enables the stethoscope to function as a critical tool in auscultation and medical examination. Thus, reflection of sound is essential to how a stethoscope operates.
See lessHow far should a person stand from the reflecting plane to hear his echo?
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound aRead more
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound and its reflected echo.
The specific distance of 28 feet is based on the speed of sound in air (~343 meters per second or ~1125 feet per second at room temperature). Therefore, sound travels approximately 28 feet in 1/10 of a second, which is the minimum time interval typically required for a clear echo to be perceived by the human ear.
Understanding the distance for hearing echoes helps in practical applications such as acoustic design, outdoor activities, and safety in environments where sound reflection may affect communication and perception. Thus, the correct answer for hearing an echo is [C] 28 feet.
See lessDue to what do sound waves produce echo?
Sound waves produce echo primarily due to [C] reflection. When sound travels and encounters a sufficiently large and hard surface, such as a solid wall, mountain, or canyon wall, it reflects off the surface rather than passing through it or bending (refraction and diffraction). The reflection of souRead more
Sound waves produce echo primarily due to [C] reflection. When sound travels and encounters a sufficiently large and hard surface, such as a solid wall, mountain, or canyon wall, it reflects off the surface rather than passing through it or bending (refraction and diffraction).
The reflection of sound waves causes them to bounce back towards the source or in other directions, depending on the angle of incidence and the surface characteristics. If the distance to the reflecting surface is significant enough, the reflected sound waves return to the listener’s ears after a noticeable delay, creating the perceptible phenomenon known as an echo.
Understanding the process of reflection and its role in producing echoes is essential for designing spaces, conducting acoustic measurements, and studying sound propagation in various environments, from natural landscapes to built structures.
See lessHow long does the effect of sound last in the human ear?
The effect of sound in the human ear, known as auditory persistence or the duration of the auditory sensation, lasts for approximately [B] 1/10 second. During this time, the auditory nerves continue to transmit signals to the brain after the sound stimulus has stopped, allowing for the perception ofRead more
The effect of sound in the human ear, known as auditory persistence or the duration of the auditory sensation, lasts for approximately [B] 1/10 second. During this time, the auditory nerves continue to transmit signals to the brain after the sound stimulus has stopped, allowing for the perception of sound even after it has ceased.
This phenomenon is crucial for understanding how humans perceive sound and process auditory information. Options [A] (1/5 second) and [C] (1/20 second) represent shorter durations that do not accurately reflect typical auditory persistence. Option [D] (1/2 second) exceeds the typical duration of auditory persistence, as sound effects are generally perceived for a shorter period in the absence of continuous stimulation.
Understanding auditory persistence helps in fields such as acoustics, psychology, and neurology, where the perception and processing of sound play critical roles in human behavior and communication.
See lessThe walls, ceiling and floor of a good auditorium are covered with some fibrous material, carpet, glass fiber etc. Its purpose is
The purpose of covering the walls, ceiling, and floor of a good auditorium with fibrous materials like carpet and glass fiber (option [D]) is to prevent echo by absorbing sound. Echoes occur when sound waves reflect off hard surfaces and bounce back, creating unwanted reverberation that can distortRead more
The purpose of covering the walls, ceiling, and floor of a good auditorium with fibrous materials like carpet and glass fiber (option [D]) is to prevent echo by absorbing sound. Echoes occur when sound waves reflect off hard surfaces and bounce back, creating unwanted reverberation that can distort speech and music.
By using sound-absorbing materials, such as acoustic panels, carpets, and fiberglass insulation, the auditorium reduces reverberation time. This improves the clarity of sound, enhances the music or speech intelligibility, and creates a more comfortable listening environment for the audience.
Additionally, these materials contribute to the overall acoustic design of the auditorium, ensuring that sound reflections are managed effectively. This acoustic treatment is essential in optimizing the auditory experience during concerts, performances, lectures, and other events held in the auditorium. Therefore, the correct answer is [D] to prevent echo by absorbing sound.
See lessWhat should be the time interval between the original sound and the echo to hear an echo?
To hear an echo clearly, the time interval between the original sound and its reflected echo should be [C] more than 1/10 seconds. This time delay is necessary for the sound waves to travel to a reflecting surface and back, creating a perceptible gap between the original sound and its echo. If the tRead more
To hear an echo clearly, the time interval between the original sound and its reflected echo should be [C] more than 1/10 seconds. This time delay is necessary for the sound waves to travel to a reflecting surface and back, creating a perceptible gap between the original sound and its echo.
If the time interval is less than 1/10 seconds (option [B]), the reflected sound waves return too quickly to be distinguished as an echo. In contrast, a delay of more than 1/10 seconds (option [C]) allows for a noticeable echo effect. This phenomenon is crucial in acoustic environments where echoes contribute to the perceived spaciousness and quality of sound.
Understanding the appropriate time interval for echo perception helps in designing spaces where echoes enhance rather than distort sound clarity, such as concert halls and auditoriums.
See lessThe working system of radar is based on the following principle
The working system of radar is based on [B] reflection of radio waves. Radar operates by transmitting short pulses of radio waves from a radar antenna. These waves travel through the atmosphere until they encounter an object, such as an aircraft or ship. Upon hitting the object, some of the radio waRead more
The working system of radar is based on [B] reflection of radio waves. Radar operates by transmitting short pulses of radio waves from a radar antenna. These waves travel through the atmosphere until they encounter an object, such as an aircraft or ship. Upon hitting the object, some of the radio waves are reflected back towards the radar antenna.
The radar system then analyzes the time it takes for the radio waves to return (to determine distance), as well as any Doppler shift in frequency (to determine speed and direction of the object). This principle of radio wave reflection forms the basis of radar technology, which is crucial for applications in aviation, maritime navigation, weather forecasting, and military surveillance.
Options [A] (refraction of radio waves), [C] (Doppler effect), and [D] (Raman effect) are not directly related to the fundamental operation of radar systems, making [B] reflection of radio waves the correct answer.
See less