Samsung Galaxy J7 SOUND

SOUND

Call alerts : The mobile phone can alert you of events such as an incoming call or an incoming message in a number of ways. The two most popular ones are vibration and ringing.

While vibration is pretty much self-explanatory, the ringing alerts can be of several types depending on the mobile phone.

In the past mobile phones used to allow only monophonic tones to be set as ringing alerts. With the advancement of technology, polyphonic ringtones also became supported.

Later on as mobile phones further evolved, they started using MP3 tones for various alert purposes. As more (presumably superior) audio formats became available (such as AAC), they were also added to the mobile phones alert system.

Recently, mobile phones have even started to use short video clips as call alerts (not to be confused with video calls).

loudspeaker : is a small sound driver fitted within a mobile phone, or other communication device, which is used to produce sound. Traditionally, loudspeakers on mobile phones are used to produce sound alerts for events such as incoming calls, incoming messages and alarms.

Since mobile phones have started doubling as portable music players in recent years, users have begun using their built-in speakers for playback of music. Acknowledging this new type of use of the mobile phone loudspeaker, manufacturers have begin to equip their m usic or video-centric mobiles with more powerful loudspeakers or even a pair of loudspeakers for accurate stereo reproduction and enhanced spatial effects.

Loudspeakers are also used to reproduce voice calls out loud, thus allowing users to deal with calls hands-free or even have conference calls with others in the same room (that use of the mobile phone is called a speakerphone, which is not to be confused with a loudspeaker).

Loudspeak er implementation can vary from model to model. For example, in order to save space and make phones thinner, some manufacturers dont use a dedicated loudspeaker but instead use the earpiece speaker to produce sound alerts as well.

One way or another, whether you use it for fun, conference calls or just for plain ringing, there is one single thing thats important - loudness. We had explored this in depth in our reviews besides the casual subjective remark, but in 2007 we decided it was time we took a more scientific approach.

So we got ourselves a handy piece of equipment - a digital noise/loudness meter - in order to start measuring objectively that all-important aspect of modern handsets - how loud is the loudspeaker in reality.

So, for the record, here is how our test setup goes. We do our tests in one and the same quiet room taking sound measurements with the handset loudspeaker facing the microphone at a distance of exactly 1 m.

We do three different tests. For each test we make several consecutive measurements - we usually disregard the highest and the lowest readings and we take the average value of the rest.

The three tests are as follows:

1) A phone ringing. We use an old-school ringtone, resembling the ringing of an old phone. It seems that most phones do well when we use it.

2) Pink noise. We use a sample of pink noise. Our readings with it are pretty indicative on how well the handset loudspeaker would fare with standard music. Teenagers definitely appreciate a handset that will allow them to crank up the volume as high as possible.

3) Human voice, male. This is an important test, since if you tend the use the loudspeaker for speakerphone purposes, loudness is really important, regardless of whether you are in a conference room or in your car.

Audio Jack : A common connector for plugging in a standard pair of music headphones such as the ones found on music players, computers and most other electronic devices with audio outputs.

It can support stereo and/or microphone, depending on the number of separate connector rings on the jack.

Some phones offer only a 2.5 mm jack, which is a smaller variety of the same principle.

Headphones supplied with mobile phones usually have a mic somewhere along the cable and a remote button that allows for managing calls without using the phone.

Some manufacturers opt for placing a 3.5mm audio jack on this remote control instead of directly on the phone itself. The reason for this is that 3.5mm jacks take up quite a lot of internal space; plus, in this way the user gets to keep the remote control/mic functionality while using third-party headphones.