Perception of Sound

Q. A sound signal is sent through a composite tube as shown in the figure. The radius of the semicircle is $R$ and speed of sound in air is $v$. If '$n$' is an integer, then the frequencies of the signal for obtaining maximum value of intensity are given by

1. $\frac{nv}{R}$
2. $\frac{nv}{(R-2)\pi }$
3. $\frac{nv}{\pi R}$
4. $\frac{nv}{R(\pi -2)}$

Q. Find the correct alternative(s) among the following, that can be deduced from the graph.

1. Sound wave $1$ is more shrill than sound wave $2$.
2. Sound wave $2$ is more shrill than sound wave $1$.
3. Sound wave $2$ is louder than sound wave $1$.
4. Sound wave $1$ is louder than sound wave $2$.

Q.

A man $X$ can hear only upto 10 kHz and another man $Y$ upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then

1. Both will hear sounds of same pitch but different quality

2. Both will hear sounds of different pitch but same quality

3. Both will hear sounds of different pitch and different quality

4. Both will hear sounds of same pitch and same quality

Q.

A man $X$ can hear only upto 10 kHz and another man $Y$ upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then

1. Both will hear sounds of same pitch but different quality

2. Both will hear sounds of different pitch but same quality

3. Both will hear sounds of different pitch and different quality

4. Both will hear sounds of same pitch and same quality

Q.

A man $X$ can hear only upto 10 kHz and another man $Y$ upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then

1. Both will hear sounds of same pitch but different quality

2. Both will hear sounds of different pitch but same quality

3. Both will hear sounds of different pitch and different quality

4. Both will hear sounds of same pitch and same quality