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Voice Search

“Siri, where is the nearest sushi restaurant?” Possibilities of Voice Search, i.e. voice search, are beginning to change the internet!

Cortana , Siri and Alexa ushered in a new generation of voice input. As a function of mobile devices or the smarthome control panel and smart speakers, voice input offers ways to control or just search the Internet.

Today, it is clear that this is not just a trend or gimmick. Voice Search offers more security in the car, a solution for smarthome users and enables internet sessions without using a monitor. What changes did voice search bring to search engines?


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How did Voice Search evolve ?

The desire to be understood by machines stretched back to the 1950s, where the first research contracts were awarded and rudimentary approaches to speech recognition were found.

Devices were capable of recognizing a vocabulary of about 200 words by the 1970s. Progress was rapid: by the mid-1980s, there were already methods that allowed computers to learn up to 20,000 vocabulary words.

Increasingly effective learning systems for artificial intelligence were responsible for the growing possibilities of speech recognition. Already in the 1990s, there were recognition systems whose vocabulary exceeded that of normal humans.


Speech recognition only became suitable for everyday use at the beginning of the 2000s with the “deep learning” method “LSTM” (Long Short-Term Memory).

Over the years, systems have learned to interpret human speech. Whereas in the beginning speech was still crystal clear and long pauses had to be made between words, systems today are increasingly capable of filtering out background noise and interpreting even unclearly spoken words more and more effectively.

Disadvantages Voice Search

One disadvantage of the availability of voice search is that devices like smarthome gadgets are basically listening in all the time. Conversations are analyzed and used by companies to improve voice recognition, for example.

Basically, devices are waiting around the clock for the words to activate, while also passively listening in. Certain recordings of conversations will also be accessible to human employees of the providers, who will listen to them and type them up – to improve the technology, they say.

Voice Search and SEO

Search engine optimization (SEO) has had to deal with the issue more and more intensively since the advent of voice input and voice recognition, and by 2018 at the latest, the trend was to extend optimization to include voice search.


Naturally phrased sentences replaced single keywords. People no longer typed “Asian restaurant Charlottenburg” into the search function, for example, but used the Voice Search as they would naturally speak: “Where is the nearest Asian restaurant in Charlottenburg?”.

Voice Search and the future

In the US, 74.2 million people are expected to use smart speakers, devices like Amazon Echo, in 2019, and 85.5 million in China. In Germany, he said, there are 11.7 million users, or 17.2 percent of people with an internet connection. In comparison: In 2016, there were about 24 million smart speaker users in the US.

The rapidly growing number of people with smart speakers or users of search functions on the smartphone suggests that the Voice Search practice will also continue to increase in the future. It can even be assumed that the number of voice searches will soon exceed that of classic search queries.

By 2020, 50% of all searches across the internet will be voice-based.

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