在单个传感器上通过时间频率表示的源运动
1Department of Electrical and Computer Engineering, University of Massachusetts Dartmouth, Dartmouth, Massachusetts 02747, USA.
The Journal of the Acoustical Society of America
|January 2, 2024
概括
本系列回顾了来自美国声学学会杂志的有影响力的历史文章. 它强调了对声学科学和实践的重要贡献.
科学领域:
- 声学 声学 在声学方面
- 声音科学科学 声音科学
- 振动力学 振动力学
背景情况:
- 美国声学学会杂志 (JASA) 有着长期发表重要研究的历史.
- 了解声学的历史轨迹对于现在和未来的进步至关重要.
研究的目的:
- 策划和分析来自JASA档案的开创性文章.
- 为了强调特定的声学研究在现场的持久影响.
主要方法:
- 历史JASA出版物的文献评论.
- 根据引用对声学科学和实践的影响和影响的文章选择.
主要成果:
- 识别了塑造了声学理解和应用的关键论文.
- 演示声学原理和技术的演变随着时间的推移.
结论:
- 声学方面的历史研究继续为当代研究提供信息.
- "反思"系列为声学领域的基础工作提供了宝贵的见解.
相关概念视频
Discrete Fourier Transform
290
The Discrete Fourier Transform (DFT) is a fundamental tool in signal processing, extending the discrete-time Fourier transform by evaluating discrete signals at uniformly spaced frequency intervals. This transformation converts a finite sequence of time-domain samples into frequency components, each representing complex sinusoids ordered by frequency. The DFT translates these sequences into the frequency domain, effectively indicating the magnitude and phase of each frequency component present...
290
Aliasing
136
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
136
Sampling Theorem
342
In signal processing, the analysis of continuous-time signals, denoted as x(t), often involves sampling techniques to convert these signals into discrete-time signals. This process is essential for digital representation and manipulation. A critical component in sampling is the train of impulses, characterized by the sampling interval and the sampling frequency. The relationship between these parameters and the original signal's properties dictates the success of the sampling process.
342
Graphical and Analytic Representation of Sinusoids
402
Analyzing two sinusoidal voltages with equal amplitude and period but different phases on an oscilloscope, an instrument used to display and analyze waveforms, involves a three-step process.
The first step is measuring the peak-to-peak value, which is twice the amplitude of the sinusoid. This provides information about the maximum voltage swing of the waveform.
Secondly, the period and angular frequency are determined. The period is the time taken for one complete cycle of the waveform, while...
The first step is measuring the peak-to-peak value, which is twice the amplitude of the sinusoid. This provides information about the maximum voltage swing of the waveform.
Secondly, the period and angular frequency are determined. The period is the time taken for one complete cycle of the waveform, while...
402
Relative Motion Analysis using Rotating Axes-Problem Solving
406
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
406
Continuous -time Fourier Transform
318
The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
318


