Haptic Feedback vs Audio Feedback: Why Touch Is Becoming the Future of Device Interaction

1.Introduction
2.How Haptic Feedback Works
3.What Audio Feedback Does Well
4.Where Sound Falls Short
5.Why Haptic Feedback Has the Advantage
6.Building Toward a Tactile-First Interaction Model

Introduction
Today's electronic devices aren't just objects you look at. They can listen to you, but don't hear you. Filling your pocket with buzzes. They ‘beep' if something is wrong. Smart technology is a feature of everyday life, and how technology communicates to the user is as crucial as what it is actually doing. Two kind of communication tools in this kit here, audio feedback and haptic feedback. Both can carry information. Both are impactful on users' perception of a product. However, they are very different and have their upsides and downsides that software developers must be aware of for designing hardware.
This detailed blog examines and analyzes the touch & sound as feedback channels, separates where they can be used where they cannot be used, and tells why haptic feedback is slowly becoming the successful main alternative in modern interface design.

How Haptic Feedback Works
Haptic feedback refers to the speech feedback generated from your phone when you press a button while using the text entry method-or when you receive a notification when there's a gentle tremor on your smartwatch. On the skin level, it operates through the skin. There are millions of mechanoreceptors (pressure receptors). These are nerve endings that are sensitive to touch, vibration and texture. These receptors detect the vibration signal and transmit information to the brain when a device emits a vibration signal. That signal gets translated by the brain almost instantly with no conscious thought; it does not have to make an effort to do so.
The strength of haptic feedback is in its directness. It is not an air transfer. There is no medium that can become congested and obstructed. Feedback is localized (i.e. delivered to the person who holding or wearing device. ) Everyone else that's around you fails to receive the message.
There are a lot of applications of this technology. Haptic feedback is used to create the feeling of physical weight and click on virtual buttons on smartphones. It is capable of confirming and pressing buttons in automotive smart cabins while driver takes their eyes off the road. For wearables, it provides silent notifications for messages, health events or directions. Haptic feedback, on the other hand, bridges the gap between the virtual world and real-world objects, allowing them to feel palpable in virtual reality.
Everything as an experience is really rooted in the hardware used under the hood. Motors vibrate in a coarse, buzzy manner, avoiding precision and having a cheap feeling. Fine and differentiated signals can be addressed to high performance actuators, resulting in realistic mechanical responses to human likeness. Bestarsensor has a special focus on just this. Having extensive experience in piezotechnology and multi-micro systems, Bestarsensor manufactures haptic actuators and vibration motors appropriate for products with high requirements for speed and low latency responses, for long operational life. The motor is where the whole thing starts for manufacturers that seek haptic feedback that not only sounds good, but smells good as well.

What Audio Feedback Does Well
The other primary means of conveying notifications about device status to the user is audio feedback. Such as, an on/off confirmation sound from a smart home device; a signal that beeps when you are driving a car backwards and come near something; the sound that notifies of a change in patient condition from a medical monitor; sound transmits information about the room, or through a wall or round a corner. It doesn't captive the user's hand, or even eye, to hold the device.
Reach is the backbones of audio feedback. Sounds cover and can be heard from a distance. They can penetrate distractions that visual signals can't. A tone can have various meanings relating to pitch, rhythm and volume. This means a slower beep is not the same as a higher one and the user can quickly learn this.
In passive alerts for where the intent is to attract awareness, not to confirm activity, the audio feedback is much more effective to get users' attention. Smoke alarms aren't saying the right thing. It's holding you and tugging at you to make a choice. No one knows how to make such an imposing interuption work better than does sound.

Where Sound Falls Short
While these are useful capabilities, audio feedback has some warts on it that come into focus when designing modern products.
The first is a privacy issue. Sound is a sound emitter. When your telephone sounds an alert in a meeting room, your alert is heard by all participants. A single medical device beeping in a quiet hospital room has the power to interrupt the complete ambience. A navigation system telling her to turn in a restaurant in a populated space is a cause for trouble. In a world where more devices are being introduced in work, medicine and social environments, not being able to send a private alert is actually a key design fault.
The second is lack of immunity to noise. Audio feedback is lost, so to speak, in any factory, construction site, live concert or bustling city street. The signal is overpowered by noise in the ambient environment. It's not a corner case. There are lots of user cases of device alerts that are all incredibly important; especially in loud environments. An industrial machinery is equipped with a process whose completion time is to be known by the industrial machinery operators. A warehouse is obliged to provide confirmation of a scan for a worker. In such environments a beep proves to be of no service.
Thirdly, dimensionality is restricted. A sound provide you with one piece of information at a time. Can tell you something has occurred. Can give you instructions to listen. However, it is not very competitive in expressing richness of experience. A single tone will not give the snappy response or pop you get from a mechanical switch, or the soft feel or rolling resistance you would get from a physical dial when turning it, or the texture you would feel when pressing through a button's travel distance. Note that sound is apoint in time. Touch is a whole body experience.

Why Haptic Feedback Has the Advantage
If we were to directly compare these two channels, haptic feedback would answer all the problems associated with the audio feedback.
When it comes to privacy, haptic feedback is inherently a localized feedback system. The vibration remains with the holder of the device. The signal is not received by anyone in the immediate vicinity. This would be perfect for use in a work environment where it may not be appropriate to make a notification known to others, when used in an enclosure where people don't want interruptions, and when used on personal machines where only the machine learns about the message.
Particularly when it comes to noise immunity, the haptic feedback does not send vibrations through the air, which makes it less influenced by noise. It runs through the device to the user's body. The user whether standing by an jet engine or a rock concert, does feel the vibration. That's why haptic warnings are increasingly standard today in safety-critical use cases where prerequisites for an audio warning are not met. The feedback is always present, not matter what acoustically is taking place in their environment.
Here lies the key to dimension and tactileity quality and real difference in the product expression by using the high-quality haptic actuators. A device can make the "click" sound of a real button, the "grinding" sound that accompanies a slider moving through its tracks, or the "crunchy" or "slippery" texture of two distinct materials. That subtle detail is what will make some consumer products look high-end or low-end. In the automotive smart cab space, it's the key to evoking the same sense of satisfaction as a human touch. This can't be done with audio feedback. There's absolutely nothing possible with the poor quality of motors, which is why component selection plays a big role in haptic design.

Building Toward a Tactile-First Interaction Model
The direction of interface design is defined with its meaning. In the next few years, as personal, professional and industrial entities become more prevalent, the need for private, reliable and expressive means of feedback channels will only increase. Audio feedback will continue to be useful in situations when reach and distance is an issue. For the majority of interactions between user and device, touch is the more powerful in more advanced form of communication.
The selection of actuators must be done right from the beginning of development, whether it is a smartphone opening with mechanical precision, a smart transparent enough mobile phone, or an industrial gadget as interactive as a mobile phone that can confirm the change of furniture in a loud room.
Bestarsensor has years of experience in piezoelectric sensing and in micro-actuators. Whether you are developing a product that requires impressive haptic feedback or want to inject more quality haptic responsiveness into your product, welcome to contact Bestarsensor. Custom motors are the backbone of custom experiences.