User zghqh

2 votes

2 answers

281 views

What is the simplest, smallest matter in the universe? [closed]

asked Jan 25, 2020 at 3:25

2 votes

1 answer

287 views

How to determine the Absorption coefficient of the material shown as follow? paper plus + air?

asked Jan 23, 2020 at 14:37

2 votes

0 answers

40 views

are there any other distinguishing characteristics for waves? [closed]

asked Jan 27, 2020 at 4:27

2 votes

1 answer

168 views

Is this a complete list of phenomena that sound wave would encounter during travelling？

asked Jan 27, 2020 at 8:48

1 vote

1 answer

70 views

What equipments/instruments do I need to determine the absorption coefficient of a cardboard box?

asked Jan 23, 2020 at 22:25

0 votes

0 answers

290 views

Is there a list of sound absorption coefficients for common types of paper/cardboard?

asked Jan 24, 2020 at 22:41

0 votes

1 answer

22 views

Absorption coefficients is composed 2 parts, is there any other quantity to measure only the transmitted part?

asked Jan 27, 2020 at 8:01

0 votes

1 answer

35 views

Could someone double check if my understanding about the area could one watt be spread over?

asked Jan 25, 2020 at 14:22

0 votes

1 answer

28 views

Cound someone help to check if this paper is talking about sound absorption coefficient of the air?

asked Jan 26, 2020 at 4:47

-1 votes

1 answer

21 views

Does object refer to group of materials in a specified structure here?

asked Jan 26, 2020 at 19:45

-2 votes

1 answer

56 views

There are 3 possibilities in total, namely, reflecting + transformed into heat + transmitted through the absorbing body, right?

asked Jan 26, 2020 at 20:36

Stack Exchange Network

11 Questions

What is the simplest, smallest matter in the universe? [closed]

How to determine the Absorption coefficient of the material shown as follow? paper plus + air?

are there any other distinguishing characteristics for waves? [closed]

Is this a complete list of phenomena that sound wave would encounter during travelling？

What equipments/instruments do I need to determine the absorption coefficient of a cardboard box?

Is there a list of sound absorption coefficients for common types of paper/cardboard?

Absorption coefficients is composed 2 parts, is there any other quantity to measure only the transmitted part?

Could someone double check if my understanding about the area could one watt be spread over?

Cound someone help to check if this paper is talking about sound absorption coefficient of the air?

Does object refer to group of materials in a specified structure here?

There are 3 possibilities in total, namely, reflecting + transformed into heat + transmitted through the absorbing body, right?