What happens when two sound waves of frequencies differing by more than 10 Hz reach our ear simultaneously?

You are listening to an $A$ note played on a violin string. Let the subscript $s$ refer to the violin string and $a$ refer to the air. Then:

The fundamental frequency of a sitar wire is 440 vibrations per seond. If the sitar player reduces the length of the wire by $1/5^{th}$, then the change in the frequency of sitater wire will be

When a long hollow cylindrical iron pipe is struck at one end, then at the other end of the pipe :

The following is best Lubricant?

A source of sound of frequency 256 Hz is moving towards a wall with a velocity of 5 m/s. The number of beats per second heard by a stationary observer between the source and the wall is (Velocity of sound = 330 m/s) 

Megaphones or loudhailers, horns, musical instruments such as trumpets and shehanais, are all designed to---------

Two waves $\mathrm{y} _{1}=\mathrm{A}\cos(0.5\pi \mathrm{x}-100\pi \mathrm{t})$
and $\mathrm{y} _{2}=\mathrm{A}\cos(0.46\pi \mathrm{x}-92\pi \mathrm{t})$ are travelling in a pipe placed along $\mathrm{x}$-axis. Find the number of times intensity is maximum in time interval of 1 sec.

The lowest wavelength of audible sound is (Velocity of sound in air is $340ms^{-1}$)

The maximum time period for a sound wave that the audible to normal human being is

The musical interval between tube two tine of frequency $400\ Hz$ and $200\ Hz$ is:

A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :

The characteristics of sound with the help of which we can distinguish between a SHRILL note and a GRAVE note is

How Jal Tarang produces sound?

Beats are heard at the rate of $12$ every $5$ seconds when two open organ pipes of lengths $84\ cm$ and $85\ cm$ are sounded together in their fundamental modes. Find the velocity of sound in air. (An open organ pipe has an antinode at each end.

An under water swimmer sends a sound signal to the surface. It is produces 5 betas/sec when compared with fundamental tone of a pipe of $20$ cm length closed at one end what is wavelength of sound in water. (take V water=$1500 m/sec$ Vair=$360 m/sec$)

identify the part which vibrates to produce sound in the following instruments.