astronomy

Ning Xiang

Ning Xiang is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ning Xiang rather than just read about it. In short: Ning Xiang (Chinese: 向宁) is a Chinese-American acoustical physicist, former Research Engineer of HEAD acoustics, and former Research Scientist of Fraunhofer Institut fuer Bauphysik, and of National Center for Physical Acoustics (NCPA). He is now Director and full professor of the Graduate Program in Architectural Acoustics at Rensselaer Polytechnic Institute.

Key takeaways

Ning Xiang belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ning Xiang to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ning Xiang from memory before moving on to harder problems.

Reference excerpt

Ning Xiang (Chinese: 向宁) is a Chinese-American acoustical physicist, former Research Engineer of HEAD acoustics, and former Research Scientist of Fraunhofer Institut fuer Bauphysik, and of National Center for Physical Acoustics (NCPA). He is now Director and full professor of the Graduate Program in Architectural Acoustics at Rensselaer Polytechnic Institute. He authored a textbook, Acoustics for Engineers, (Springer) with Jens Blauert, and edited Acoustics, Information, and Communication (Springer) with Gerhard Sessler, a memorial volume in honor of Manfred R. Schroeder in 2015. In 2017 he edited Architectural Acoustics Handbook (J. Ross Publishing). He is an expert in architectural acoustics, and received the Wallace Clement Sabine Medal from the Acoustical Society of America in 2014. Xiang was born in Tianjin, China to Xiang Yang, a high school principal. He received his undergraduate education studying communication engineering from Tianjin University in Tianjin, China and later received a doctorate in engineering after studying acoustics and communication engineering under Jens Blauert from Ruhr-University Bochum, Germany. Xiang is a Fellow of the Acoustical Society of America, and a Fellow of the Institute of Acoustics, United Kingdom. He is an associate editor of the Journal of the Acoustical Society of America. He is internationally recognized for his contributions to measurements and analysis techniques, and numerical simulation of sound fields in coupled rooms evidenced by his over 400 publications in journals, magazines, and conference proceedings. With Jens Blauert he developed binaural scale-modeling since 1991. He developed a new method in 1995 using nonlinear regression for estimating reverberation times. With James Sabatier he successfully applied acoustic-to-seismic coupling in landmine detection. With Manfred R. Schroeder he developed a simultaneous dual channel measurement method using reciprocal maximum-length sequences (2003). He is a promoter of Bayesian analysis in acoustics. Xiang was visiting professor at Pierre and Marie Curie University (UPMC) in June 2013.

Books Acoustics for Engineers (Springer-Verlag, 1st ed. 2008, 2nd ed. 2009. 3rd ed. 2021) Architectural Acoustics Handbook (J. Ross Publishing, 2017) Acoustics, Information and Communication -- a Memorial Volume in Honor of Manfred R. Schroeder (with co-editor Gerhard Sessler, Springer-Verlag, 2015)

References

Worked examples

Example 1 — a first encounter with Ning Xiang

Start with the simplest possible case. Write down what Ning Xiang claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ning Xiang before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ning Xiang ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ning Xiang

In research: Ning Xiang appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ning Xiang in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ning Xiang is common in secondary-school and first-year university syllabi. It links to neighbouring topics Acousticians, American acoustical engineers, Chinese emigrants to the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Ning Xiang outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Ning Xiang” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Ning Xiang in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ning Xiang means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ning Xiang out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ning Xiang in simple terms?

Why does Ning Xiang matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ning Xiang?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ning Xiang.