What is reverberation? How can it be reduced?
Solution and Explanation
Reverberation is the prolonged and repeated reflection of sound within a large enclosed space.
To minimize reverberation, walls and ceilings of enclosed spaces can be treated with sound-absorbing materials, such as loose woolens and fiberboards.
Top Questions on Reflection of Sound
- Which of the following statements are true for "Sound" ?
- WBJEE JENPAS UG - 2022
- Physical Sciences
- Reflection of Sound
- Give two practical applications of reflection of sound waves.
- CBSE Class IX
- Science
- Reflection of Sound
- When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
- CBSE Class IX
- Science
- Reflection of Sound
- Does sound follow the same laws of reflection as light does? Explain.
- CBSE Class IX
- Science
- Reflection of Sound
Questions Asked in CBSE Class IX exam
- What are the precious things mentioned in the story? Why are they precious?
- CBSE Class IX
- The happy prince
In Fig. 9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that ∠ BEC = 130° and ∠ ECD = 20°. Find ∠ BAC.
- CBSE Class IX
- Angle Subtended by an Arc of a Circle
- The text you read is a travelogue where the author, Vikram Seth, talks about his visit to two sacred places in Kathmandu. Imagine that you were with Vikram Seth on his visit to Pashupatinath temple, and you were noting down all that you saw and did there, so that you could write a travelogue later.
Record in point form • what you see when you reach the Pashupatinath temple • what you see happening inside the temple • what you do when inside the temple • what you see outside the temple • what your impressions are about the place.- CBSE Class IX
- Kathmandu
Two circles intersect at two points B and C. Through B, two line segments ABD and PBQ are drawn to intersect the circles at A, D and P, Q respectively (see Fig. 9.27). Prove that ∠ACP = ∠ QCD
- CBSE Class IX
- Angle Subtended by an Arc of a Circle
ABCD is a trapezium in which AB || CD and AD = BC (see Fig. 8.14). Show that
(i) ∠A = ∠B
(ii) ∠C = ∠D
(iii) ∆ABC ≅ ∠∆BAD
(iv) diagonal AC = diagonal BD [Hint : Extend AB and draw a line through C parallel to DA intersecting AB produced at E.]
- CBSE Class IX
- Properties of a Parallelogram
Concepts Used:
Sound
Sound is a vibration that propagates the mechanical wave of displacement and pressure, through a medium can be of any matter. In other words, the sound is the thin line between Music sound and Noise.
Types of Sounds:
Sound can be divided into two types depending on its frequency. The following are:-
Infrasonic Waves:
- Infrasonic waves have a frequency lower than 20 Hz. Since it is below the human hearing range, it is inaudible to humans.
- However, several other living organisms use these waves to communicate, whales, sharks, elephants, hippopotamus, etc. these waves are also used in the scientific field, it is used to study upcoming earthquakes, volcanic eruptions, human heart rates, rock formation stages, etc.
Ultrasonic waves:
- Ultrasonic waves have a frequency higher than 20 kHz. Since it is above the human hearing range, it is inaudible to humans.
- These waves are used in the scientific field, it is used to study human heart rates, to take sonograms, navigation of directions, imaging things, uniform sample mixing, communication, testing of samples, etc.