Vocal efforts vary from a subdued whisper to loud shouting. At the same time, speech, regarded as an acoustic signal, is the type of sound that we are most familiar with. While language can be something that groups of people have in common, the sound and character of the voice is individual from person to person. The voice as a sound source is important to understand.
#Speech timer 1500 full
When you are ready for a deeper dive into the theory, you should check out the full article below the playlist.
#Speech timer 1500 series
You can get a quick head start by watching a series of short videos to introduce and explain some important factors that impact intelligibility of the voice. Otherwise be prepared to compensate (equalize) to obtain the correct sound. Be ready to pick the right microphone designed for use in the position you are placing it. So when placing a microphone be aware of these issues. If the microphone does not compensate for this you should make corrections with an equalizer. This results in reduced speech intelligibility. For instance, the spectrum of speech recorded on the chest of a person normally lacks frequencies in the important range of 2-4 kHz. Standing to the side or behind the person reduces the naturalness and intelligibility.Īctually, the voice chances spectrum in almost any other position than when we approach the speaking person with our ear – or microphone.Įach position on the head or the chest has its’ own sound color – or timbre. We perceive the voice as natural and with the highest intelligibility when we are approximately 1 meter in front of the person talking. More specifically, in the 2 kHz-4 kHz frequency range. The consonants (k, p, s, t, etc.) are predominantly found in the frequency range above 500 Hz. In non-tonal languages the consonants are important. Be sure that all peaks survive through the recording chain. When recording, you will find that the peaks of the acoustical signal are much higher than then the RMS or average level. Shouting sounds different from talking with a casual voice. Even the pitch of the voice changes with vocal effort. By affecting the cavities above the vocal cords (pharyngeal, oral, nasal), filtering is added to the voice spectrum.Ĭhanging the vocal effort changes both level and frequency spectrum of the voice sound. By controlling the vocal cords the level and the pitch of the voice can vary. So when recording the voice, you should always consider speech intelligibility.Īir passes the vocal cords and creates sound. Read more about what different mic placements does to the voice here.
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