You just bought this brand new 50 inch LED TV. The picture is fantastic and includes all the latest Smart TV features. Get it home, plug it in and go through the manual. You can set it to watch your favorite shows or movies. The picture looks wonderful, but the sound is terrible. The sound is confusing and the dialog is essentially impossible. After slipping with all the built-in audio settings, you will eventually give up and withdraw or decide to make use of it.
There are alternatives, some cheap and some not as cheap as I'll discuss a little, but first look at the basis of the problem.
Why TV Audio Is So Bad
There are four main reasons for poor sound quality in today's televisions. Most of these have to do with making TVs attractive. One of the miracles of today's LED televisions is how thin and light they are. Can you imagine hanging a 50in CRT TV on the wall? However, TV thinness has some serious compromises in the quality and design of the speaker subsystem.
First, speakers are much smaller in today's televisions than in older CRT televisions. The elements are typically rectangular (1 inch x 3 inches) with very small movements. The sound is done by moving a loudspeaker element (pushing the air). This is called displacement. The displacement is especially important for low frequencies. The higher the speaker displacement, the lower the frequency you can generate. The basic frequency of the male's voice is between 85 Hz and 180 Hz, while the basic frequency of a female voice is between 165 Hz and 255 Hz. Due to the physical size and limited movement of the speakers, the natural frequency response of the TV speaker is less than 200 Hz. This way you will not hear or hear the basic frequency of the sound. What you hear is the harmonics (multiples of the fundamental frequency) that are lower in amplitude and decay; and the only reason he hears all the dialogues is the harmonics. When your ears hear these harmonics, your brain thinks that you can hear the base at a lower volume. That is why dialogue is silenced.
Not only is the modern TV thin, but also has very thin edges (the picture frame on the TV display). Since the front panels are so thin that there is no space for the speakers to be placed, the speakers are either on the back of the TV or downwards along the thickness of the TV. This directs the sound from the viewer and exits the wall or the TV stand. During these builds, frequencies can eliminate themselves, strengthen themselves, or interact, which can cause the sound to spread. In the old days, television design had a longer front panel under the tube where speakers were usually placed. The speakers are positioned to confront the viewer, thus minimizing reflections (reflections) that give a much clearer sound.
Low Power Drives
Due to the size, cost and power outage of the speakers, the output power of the speakers in today's televisions is usually between 5 and 10 watts per channel (stereo). channel). How loud it will be about the efficiency of the speaker and how far the viewer is. The recommended viewing distance of 50in HDTV is around 8-10 feet. Taking into account the typical TV speaker and the recommended viewing distance, the maximum volume corresponds to about one loud radio in an average room. However, the speakers point at you. If the speakers move away or away, the volume will be less and the sound on the TV seems to be underperforming.
Bad Audio Algorithms
TV manufacturers are trying to solve these problems by using sophisticated audio processors to compensate for speaker design errors. The algorithms performed by such processors are used to enhance bass or virtual surround sound and even audio. However, the algorithms used are far from optimal. The algorithms used do not compensate for changes in the source material, so things can sound good on TV channels or in the show, but they are terrible for the other. The algorithms are static if they have to be dynamic, so they can respond to changes in the source content. Some of the algorithms are only merged. Instead of looking at the full sound experience, each algorithm is optimized for its own performance. Optimizing the components of the subsystem rarely leads to optimization of the entire system. For example, if you optimize for bass, it will compromise the surround sound algorithm, and on the contrary, if you optimize the surround algorithm, it will compromise the bass. Without them, the algorithms are tuned so that the overall result is optimized, the sound does not improve. Finally, unless properly tuned (which rarely happens), these algorithms do not solve the problem.
What Solutions Are Available?
There are many solutions available from free to expensive. Each has a variable impact on the problem.
The free solution is to set up your TV's audio settings. Enter the TV settings menu and select the audio setup panel. Then turn off as many settings as possible. For example, turn off surround sound, turn off bass correction, turn off Dolby, and so on. If you have a bass and a high volume, make sure that each is exactly the same as usually 50%, but it can be up to 100%. Turn off the melody and night mode or the commercial mode. If your TV has any equalizer, set the TV. This sets the TV to a baseline. If the dialog box still doesn't like it, the other settings won't help. If it improves, you can return to the settings and set the bass and treble. Turning on the other effects will not do anything for the dialog, so leave them.
If none of them work and have speakers facing down or back, the next solution will cost you money. This is a sound track. The soundtrack is exactly what the name says, a bar with several left and right speakers. The track receives different tones from the TV via different connections. The speakers are generally better than a typical TV speaker, and the band has its own power supply and internal amplifier, making it louder than normal TV. The best thing is that the speakers are pre-mounted; she pointed right at you.
There are many sound tracks, some with subwoofers, some without. Some are multi-channel and some are not. However, the best bang is with two-channel (2.0) or 2-channel (2.1) audio tracks. Multi-channel audio tracks do not give the same results as a full multi-channel home theater system. The reason is that, in a multi-channel home theater system, the speakers are placed around it to make the sound placement complete. However, the multi-channel audio track is still in front of all speakers, so as long as you get all the channels, you lose the sense of placement. It should be noted that there are very few transmissions with multi-channel. These are mostly 2 channels. So if you broadcast the primary use of the television, the multi-channel system will not be very good.
The 2-channel or 2.1-channel audio tracks have different software algorithms that allow repairs (bass correction, simulated surround sound, etc.). If you are primarily interested in the dialog box, set the panels in the audio track, disable them for the same reasons I mentioned on my TV above. The processed sound, although better than a TV, can still be muddy. If you already have an acceptable dialog box, you can make the other settings if you wish.
The use of a subwoofer may be good and bad. The proper use of the subwoofer adds more sound to the sound. Your ear is expecting to hear these frequencies, and if you are not there or are silent, you almost feel that you have a hole to fill. Be careful though. The subwoofer typically has its own amplifier and volume control, so you can set it separately from the main speakers. Keep the volume of the subwoofer low (remember only filler). If the subwoofer volume is too high, the other frequencies will dominate and will be terrible. If you want the special effect to be cut out of your chair with an explosion, then you are ready to lose the dialog. Adjust the volume in small increments until you reach the desired effect.
The Home Theater System
There is a third possibility to improve the TV sound, but typically includes more expensive and much more settings. This is the option of a home theater system. Because of the complexity and cost, I won't run into this debate.
The sound of today's televisions is inappropriate because of the placement of low-powered speakers (away from the listener) and the use of optimal audio algorithms. In order to improve quality (especially in the dialog), the consumer can set the TV itself; remove any sound-specific effect, purchase soundtrack (remove any audio effect), or purchase a home theater system. The soundtrack is the best cost / performance / complexity compromise for the consumer.
Source by sbobet