Loudness measures the subjective perception of sound by the human ear, while intensity quantifies the actual physical energy of the sound wave.
Tiwari Academy Discussion Latest Questions
Sounds with frequencies below 20 Hz are called infrasonic sound or infrasound. Humans generally cannot hear them. Give examples of animals that use infrasound for communication and the frequency they use.
Children under the age of five can hear frequencies up to 25 kHz, whereas adults typically cannot hear frequencies this high, as their ears become less sensitive to higher frequencies with age.
The audible range of sound frequencies for human beings extends from about 20 Hz to 20,000 Hz.
Examples of sound-absorbent materials used in auditoriums include compressed fibreboard, rough plaster, draperies, and specially selected seat materials that absorb sound effectively.
Sound-absorbent materials help in reducing reverberation by absorbing sound waves instead of reflecting them, thereby reducing the persistence and overlap of sound.
compressed fibreboard, rough plaster, draperies, and seat materials designed for their sound-absorbing properties.
Excessive reverberation is undesirable in an auditorium or big hall because it can cause sound to persist and overlap, making speech and music unclear and difficult to understand.
Reverberation is the persistence of sound in a large hall or auditorium due to repeated reflections off the walls and other surfaces until the sound is reduced to a level where it is no longer audible.
The perception of multiple echoes, caused by successive reflections of sound waves, contributes to the prolonged rumbling or rolling sound characteristic of thunder.