標題: Titlebook: Electroacoustical Reference Data; John M. Eargle Book 2002 Springer Science+Business Media New York 2002 Damping.Modulation.Signal.Transdu [打印本頁] 作者: monster 時間: 2025-3-21 19:20
書目名稱Electroacoustical Reference Data影響因子(影響力)
作者: Malleable 時間: 2025-3-21 23:52
Dipanwita Majumdar,Himadri Tanaya Dasc enclosed volume coupled through a small orifice to the outside space. Resonance takes place when the system is excited by a frequency that is a function of the enclosed volume and the ratio of the volume and orifice diameter. The assumption is made that the thickness of the enclosure is negligible作者: Evacuate 時間: 2025-3-22 00:35 作者: Ethics 時間: 2025-3-22 07:47
Noise and Vibration from Railroad Traffic,om the desired amount of noise loss. In Figure 16A, S represents a line source, such as a busy freeway, and the barrier is actually a long wall viewed along its end. R represents a target residence where a certain amount of sound attenuation is desired, as compared to the case where there is no barr作者: 思想 時間: 2025-3-22 09:11 作者: 卡死偷電 時間: 2025-3-22 13:24
Cynthia Stifter,Mairin AugustineIn Figure 2, for frequencies from 10 Hz to 100 kHz, wavelength is plotted in meters (left ordinate) and in feet (right ordinate). Normal temperature is assumed. The relevant equations are: . and ..作者: 卡死偷電 時間: 2025-3-22 20:33 作者: FUME 時間: 2025-3-22 21:36 作者: Encoding 時間: 2025-3-23 01:29
Rosella Fattori M.D.,Marco Di Eusanio M.D.Figure 5 shows the energy attenuation constant, m, in inverse meters (m.) as a function of frequency and relative humidity. In this form, the data can be used to determine the effects of atmospheric losses on reverberation time at high frequencies.作者: 克制 時間: 2025-3-23 08:02 作者: CHIDE 時間: 2025-3-23 09:49
The EU in Global Energy GovernanceFigure 7 presents atmospheric attenuation data and inverse square losses at several distances for relative humidities of 20 and 80%. In this form, the data are useful for recording engineers in estimating sound pickup characteristics at large microphone distances.作者: Indebted 時間: 2025-3-23 15:15 作者: 是貪求 時間: 2025-3-23 19:17 作者: landmark 時間: 2025-3-24 00:47
Electrochemical Energy Storage SystemsFigure 11 gives the nominal length of an open pipe that will resonate at a particular frequency. This occurs when the pipe is approximately equal in length to one-half the wavelength of the frequency. Pipes that are particularly large in diameter may need to be modified in length, in order to determine their actual “speaking length.”作者: Limerick 時間: 2025-3-24 05:49
Y. F. Xu,Ming Li,Y. F. Wang,Ruzhu WangAssume that the open pipe in the previous example was specified as being of a particular diameter. We now want to determine what degree of end correction must be incorporated to attain the desired frequency. Figure 12 shows the relation between the increase in the speaking length of pipe and its length-to-radius ratio (L/R).作者: 涂掉 時間: 2025-3-24 08:59 作者: LAITY 時間: 2025-3-24 11:44
Living reference work 20200th editionThe data given in Figure 15 show the measured on-axis response of a small loudspeaker placed, as shown, on several objects of the general dimensions indicated. It should be clear that shapes that avoid sharp transitions give a smooth response.作者: COMMA 時間: 2025-3-24 16:16 作者: FAST 時間: 2025-3-24 20:48
The Evolution of Complex Engineering SystemsRoom constant (R) identifies the effective absorption in a space in terms of square meters of totally absorptive surface. Its definition was given in section 17.作者: 疲勞 時間: 2025-3-25 00:35
Sound Pressure and dB Lp (Sound Pressure Level)In virtually all acoustical level measurements, a reference pressure of 20 μN/m. (20 micropascals) is used to determine dB L.. The relevant equation is:. where .. An equivalent quantity in the CGS system of units is.0002 dynes/cm..作者: 骨 時間: 2025-3-25 06:24
Frequency and Wavelength in AirIn Figure 2, for frequencies from 10 Hz to 100 kHz, wavelength is plotted in meters (left ordinate) and in feet (right ordinate). Normal temperature is assumed. The relevant equations are: . and ..作者: intrigue 時間: 2025-3-25 08:48 作者: left-ventricle 時間: 2025-3-25 13:10 作者: Seizure 時間: 2025-3-25 19:23 作者: 鐵砧 時間: 2025-3-25 21:11
Atmospheric Sound Absorption as a Function of Frequency and Relative Humidity, IIEssentially, the same data from section 5 are replotted in Figure 6, and extended to lower frequencies. The attenuation constant is given in dB per meter; in this form, it can be used to calculate the excess losses over distance due to atmospheric effects.作者: Leisureliness 時間: 2025-3-26 03:38 作者: Binge-Drinking 時間: 2025-3-26 07:42
NC and PNC Noise Criteria CurvesNoise criteria curves, developed in 1957, are used to determine the so-called NC rating, quantifying as a single number the noise present in an architectural space. Most measurements are made in octave-wide bands from 63 Hz to 8 kHz.作者: IRS 時間: 2025-3-26 11:01
Sound Transmission Class (STC) CurvesSound transmission class curves, shown in Figure 9, are used to determine, as a single number, the effectiveness of walls and other architectural barriers in isolating airborne noise between spaces.作者: defibrillator 時間: 2025-3-26 15:23
Resonance Frequency for Pipes Open at Both EndsFigure 11 gives the nominal length of an open pipe that will resonate at a particular frequency. This occurs when the pipe is approximately equal in length to one-half the wavelength of the frequency. Pipes that are particularly large in diameter may need to be modified in length, in order to determine their actual “speaking length.”作者: Neuropeptides 時間: 2025-3-26 18:00
End Correction for PipesAssume that the open pipe in the previous example was specified as being of a particular diameter. We now want to determine what degree of end correction must be incorporated to attain the desired frequency. Figure 12 shows the relation between the increase in the speaking length of pipe and its length-to-radius ratio (L/R).作者: Madrigal 時間: 2025-3-26 22:29
Resonance Frequency for Pipes Open at One EndIn effect, a stopped pipe is open at the mouth end and stopped at the other. Its resonance frequency has a wavelength that is nominally one-fourth the length of the pipe. Figure 13 shows the relation between the length of the pipe and its resonance frequency.作者: Trypsin 時間: 2025-3-27 02:27
Response Curves Showing Diffraction by 10 Objects of Different ShapeThe data given in Figure 15 show the measured on-axis response of a small loudspeaker placed, as shown, on several objects of the general dimensions indicated. It should be clear that shapes that avoid sharp transitions give a smooth response.作者: 鄙視讀作 時間: 2025-3-27 06:28
Definition of Critical DistanceFigure 17 is the first of many that will relate direct and reverberant field measurements in large enclosed spaces. The equation that gives the reduction in sound pressure as we move away from a point source is as follows:.We can state this loss in decibels as follows: 2作者: 盡責 時間: 2025-3-27 13:32 作者: certain 時間: 2025-3-27 13:48 作者: RUPT 時間: 2025-3-27 20:51
Noise and Vibration from Railroad Traffic,om the desired amount of noise loss. In Figure 16A, S represents a line source, such as a busy freeway, and the barrier is actually a long wall viewed along its end. R represents a target residence where a certain amount of sound attenuation is desired, as compared to the case where there is no barrier.作者: craving 時間: 2025-3-27 22:14
Diffraction of Sound by a Cylinder, a Cube, and a Spheretive pressure level are given for a number of angles of incidence. The plots show the level of the pressure that exists at the front surface. Thus, they give a good indication of the nominal response of a microphone of the same shape.作者: 情感 時間: 2025-3-28 03:57 作者: Collision 時間: 2025-3-28 09:35
http://image.papertrans.cn/e/image/305826.jpg作者: 使苦惱 時間: 2025-3-28 14:17
978-1-4613-5839-8Springer Science+Business Media New York 2002作者: URN 時間: 2025-3-28 18:16 作者: bacteria 時間: 2025-3-28 20:51 作者: cumulative 時間: 2025-3-29 00:10 作者: Expressly 時間: 2025-3-29 05:29 作者: kidney 時間: 2025-3-29 07:52 作者: 蹣跚 時間: 2025-3-29 14:27
Diffraction of Sound by a Cylinder, a Cube, and a Spheretive pressure level are given for a number of angles of incidence. The plots show the level of the pressure that exists at the front surface. Thus, they give a good indication of the nominal response of a microphone of the same shape.作者: 消毒 時間: 2025-3-29 19:18 作者: bile648 時間: 2025-3-29 21:52 作者: Morsel 時間: 2025-3-30 02:24
ivided into the following sections: A. General Acoustical Relationships. This section covers the behavior of sound transmis- sion in reverberant and free fields, sound absorption and diffraction, and directional characteris- tics of basic sound radiators. B. Loudspeakers. Loudspeakers are discussed in terms o978-1-4613-5839-8978-1-4615-2027-6作者: 摘要記錄 時間: 2025-3-30 07:22
Advances, Prospects and Limitations of Genetic Tools for Pest Management Strategies in Sri Lankapests. This chapter outlines the principles and techniques widely used in conventional farming with their pros and cons. However, emphasis is given to the modern genetic tools, viz., transgenic approach, insect sterile techniques, and the possible use of RNAi in developing pest management strategies作者: NEG 時間: 2025-3-30 11:27 作者: 表示向前 時間: 2025-3-30 13:27 作者: Irremediable 時間: 2025-3-30 18:06 作者: placebo 時間: 2025-3-30 21:48
Textbook 2016s and other natural sciences is maintained throughout. In addition to basic concepts of random variables, distributions, expected values and statistics, the book discusses the notions of entropy, Markov processes, and fundamentals of random number generation and Monte-Carlo methods.作者: 殺子女者 時間: 2025-3-31 03:45
Concept Drift Detection Using Autoencoders in Data Streams Processingcost function. Two cost functions are applied in this paper: the cross-entropy and the reconstruction error. Preliminary experimental results show that the proposed autoencoder-based detector is able to handle different types of concept drift, e.g. the sudden or the gradual.作者: 大量 時間: 2025-3-31 07:58
Ockham and Chatton on the Origin of Logical Concepts confrère Walter Chatton convincingly defends their natural origin. Stating that our logical concepts are innate or instead that they result from the internalization of a conventional language paves the way to different treatments of mental language. In this paper, we shall compare Ockham’s and Chatton’s views of logical concepts.作者: agonist 時間: 2025-3-31 09:53 作者: Goblet-Cells 時間: 2025-3-31 13:55
S. P. Guptaen the output of the amplifier stage is distorted and it is the function of the equalizer to remove the signal distortions, thus providing a reasonable pulse shape to the filter section. Finally, the filter maximizes the signal-to-noise ratio while introducing minimal distortion to the signal itself作者: 不規(guī)則 時間: 2025-3-31 19:23
Reza Rader the last decade, and this book provides a framework for understanding the intersections of these disruptions and their effect on an already-fragile democratic circumstance in the United States..978-3-031-24058-4978-3-031-24056-0作者: follicular-unit 時間: 2025-4-1 00:57 作者: magnanimity 時間: 2025-4-1 03:01
Y. Kawahigashiazu werden neue experi- mentelle und theoretische Ergebnisse einbezogen, welche aus dem Zeitraum der letzten zehn bis fünfzehn Jahre stammen. Vollst?ndigkeit wurde nicht angestrebt. So mag der Leser vielleicht die Behandlung der galvanomagnetischen Effekte oder eine ausflihrlichere Beschreibung des 作者: DUCE 時間: 2025-4-1 06:43
