Comfort: 
The only way to judge the comfort is to put on set of head phone for at least 10 minutes. If it is uncomfortable then headphone and its sound quality is useless, so be precise in selecting type of head phone. Ideal headphone should be light weight, does not produce too much pressure on your ears
Connector
- Minijack plug (also known as 1/8 inch and 3.5mm): This is the most common headphone connector, now a day’s all source of audio devices have this type of connector jack like mobile phones iPods, laptop, tablets etc
- ¼ inch plug: This type of connector is required for connecting headphone to guitar amps, DJ mixers and non portable audio devices.
- 2.5mm jack: Commonly used in old cell phones
Frequency response: While buying a head phone one must check frequency response which lies between audible frequency range i.e. 10 Hz-20KHz, here lower frequency produces base effect and higher range frequency produces treble sound.
Total harmonic distortion (THD): True headphones have lower THD. Standard THD of a headphone must be lower than 1%; lower the THD better is sound quality.
Impedance: 
Sensitivity (loudness): A measure of headphone efficiency in dBs per milliwatt of input. A low number means that the headphones need more power to sound as loud as those which have a higher sensitivity. Typical sensitivity ranges between 90dB – 150dB
Other points are: Head phone must be durable and portable as per user requirement
Some of mobile headphones are equipped with microphone and nowadays there is a trend of buying ear buds which are smaller in size comfortable and fits in ear canal canceling noise from surroundings. Please do not use these types of head phones while driving or crossing roads and railway tracks. Explore wide range of headphones/earphones at MirchiMart
