As the distance from the sound source increases, what happens to the sound intensity? A. It increases. B. It remains the same. C. It decreases. D. It becomes zero. 相关知识点: 试题来源: 解析 C。中文解析:文中提到在封闭房间里测量不同距离处的声音强度,发现随着距离声源的距离增加,声音强度...
What is the intensity of a sound with a measured intensity level of 84 dB? By what factor will an intensity change for a 3.7 dB increase in the sound level? A certain sound level is increased by an additional 20 dB. By how much does...
Noise pollution is an invisible danger. It is sounds or noises that are either unnatural in volume or production. The loudness of sound is measured in decibels (dB). A normal conversation is about 60 dB, but a lawnmower is about 90 dB and a rock concert is about 120 dB. Repeated ...
Fechner law.Let /denote the intensity of a sound .The least intense sound that can be heard is I'=10^(-12) watt/m^2 at a frequency of 1000 cycles/sec(this value is called the threshold of audibility).If L denotes the loudness of a sound,measured in decibels,then L=10log(I/I')...
Intensity, as of sound or light The strength of the wind. Strength Intensity of emotion or belief The strength of feeling among the voters. Strength Cogency or persuasiveness The strength of his argument. Strength Effective or binding force; efficacy The strength of an argument. Strength Firmness...
Temperature dependence of single-bubble sonoluminescence threshold in sulfuric acid: An experimental study We experimentally investigated the temperature dependence of intensity of single-bubble sonoluminescence (SBSL) in 85 wt %. sulfuric acid. It was found tha... V Bandara,P Herath,A Nanayakkara -...
It would be difficult to account for the large range of sound levels in human hearing using a linear scale, so the decibel is a logarithmic unit. Some people describe one decibel as the "just noticeable difference" of intensity between two sounds, but this only holds for quieter sounds. Th...
- Bell: This is a logarithmic unit used to express the ratio of two values, typically power or intensity.- Decibel (dB): This is a more commonly used unit that is one-tenth of a Bell. It is used to measure sound intensity levels and is widely used in acoustics.- Phon: This unit ...
Figure 1: Sound pressure, sound power and sound intensity can all be expressed in decibels (dB) even though they represent different measured quantities. The measurement units used in sound pressure, sound power, and sound intensity are different. Often the measurement unit is omitted ...
Let us start with the artist’s namesake: white noise. A signal is referred to as “white noise” if the intensity of the noise, measured in decibels (dB), is equal across all frequencies in a given range. For humans, we tend to be interested in the band between 20 Hz and 20,000...