Hearing aids are assistive devices that cannot fully replace the natural function of human hearing organs. Just like dentures or eyeglasses can help improve one’s abilities but cannot restore them to their original or better-than-normal condition, hearing aids function in a similar way. They help people with hearing loss hear more clearly and communicate more easily, but they cannot completely restore natural hearing. One of the most common issues encountered in clinics is “not hearing clearly.” Today, we’ll summarize four common questions to help everyone better understand this topic.

1. Difficulty hearing clearly in noisy environments

1.1 The hearing aid has no directional function.
Standard hearing aids do not have directional microphones, which means they amplify all surrounding sounds. As a result, speech clarity may be reduced in noisy environments. The solution is to choose a hearing aid equipped with directional microphones—devices with two microphones can better focus on speech and suppress background noise, helping you hear more clearly even in noisy places.

1.2 Not using binaural hearing aids.
Many people worry that wearing two hearing aids will make sounds even louder or more uncomfortable, so they wear only one. This is a common misunderstanding. The human auditory system naturally reduces background noise when both ears receive sound. The brain uses slight differences in timing and phase between the two ears to distinguish speech from noise. In other words, two ears work better than one at filtering unwanted sounds. Studies show that binaural hearing provides about a 5dB advantage over single-ear hearing, allowing for clearer listening in noisy environments.

2. Difficulty hearing phone calls clearly

2.1 Incorrect phone positioning.
The microphone inlet of a hearing aid (usually near the earhook or faceplate) is where sound enters. When answering a call, place the phone near the top of your ear (pinna) so that the sound can go directly into the microphone. If the phone is too far away, the sound will be faint and unclear.

2.2 Use Bluetooth or phone streaming features.
Alternatively, you can remove the hearing aid temporarily or use Bluetooth-enabled hearing aids that support direct phone streaming. When a call comes in, the sound automatically transmits to the hearing aids, making phone conversations much clearer.

3. Difficulty hearing clearly in classrooms

In classrooms, background noise and chatter from other students can make it difficult to hear the teacher clearly—especially for children. A highly effective solution is to use Mimitakara Bluetooth microphones or MFI (Made for iPhone) remote listening systems.
These devices transmit the teacher’s voice directly to the student’s hearing aids within a 20-meter range, regardless of distance or direction, as if the teacher were speaking right in front of them. Many children have significantly improved their learning outcomes thanks to Mimitakara Bluetooth microphones.

4. Difficulty hearing TV clearly

In daily life, you might find it hard to hear the TV clearly or need to turn the volume up so high that it disturbs others. Sometimes, even with higher volume, speech still sounds unclear.
This problem can be solved using Mimitakara digital Bluetooth hearing aids with the StreamLine TV box. Simply connect your hearing aids to the StreamLine TV transmitter, and the TV sound will stream directly to your hearing aids—delivering clear, smooth audio without turning up the TV volume.

If your hearing problems are caused by inner ear injury, Digibionic also offers consultation and referrals to hospital-based audiology services for accurate diagnosis and treatment guidance.
For more information or detailed inquiries, please contact us at the Digibionic Service Center, Sena Nikhom 1.