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Introduction
Well, it does relate to tones with the
buzzing sounds similar to the noise made by a mosquito but it is not directly
related to ultra-sonic mosquito repellant devices in any way.
Humans can hear the sounds between
frequencies of 20 Hz to 20 KHz.
Mosquito tones are high-frequency tones, normally above 17 KHz.
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These tones are inaudible by adults but can
be heard by teenagers. Yes, you read it correctly! Teenagers can hear mosquito
tones but adults cannot. That is because it is normal for people to lose their
hearing as they age and as a result, they are unable to hear the higher
frequency sounds. With age, the audible audio frequency range continue to
narrow down with losses towards the high frequency. The actual audible range
can vary across individuals who are similar in age.
While there are both desired and undesired
uses of mosquito tone in various applications, presence of mosquito tone is
generally not acceptable in the media content delivered by various content
delivery services. Presence of mosquito tones can cause severe degradation in
user experience for the younger population. Infants & toddlers hearing
systems can be severely impacted by the presence of such tones as the adults
will not even notice their presence while unknowingly exposing kids to them for
an extended period of time.
It is therefore important for content
providers to ensure mosquito tones are not present in the delivered content.
This is where the challenge comes in.
Most of the QC operators working with
content providers are adults and as a result will inevitably miss the mosquito
tone even if it is present in the content. So, performing a full manual QC of
the audio is certainly not sufficient to detect this. Missing such signals can
prove to be very expensive for content providers in terms of increased churn as
well as related legal liability, as this could be potentially harmful to the
public health. In case of delivery mediums like television, the negative effect
could be very wide-spread due to the inherent broadcast nature of the delivery
medium.
Therefore, since it is clear that manual QC
for detection of these tones will not work, using a QC tool that can
performance a reliable detection of mosquito tones is necessary.
Venera’s QC tools – Quasar & Pulsar, perform audio
spectrum analysis and can reliably report the presence of mosquito tones in the
content. Users have the flexibility to define the frequency range for these
tones, and all the mosquito tones in that range will be reliably reported for
user’s review. Moreover, all such tones can be detected in an automated manner,
thereby improving the workflow efficiencies significantly while saving content
providers from any claims downstream.
Visit www.veneratech.com/pulsar to
read more about Pulsar™ and request a free trial.
Visit www.veneratech.com/quasar to
read more about Quasar® and request a free trial.
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