Telephone Tone Hole Segmentation for Ear Position Deviation
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Solution Overview
Problem
The design of modern telephone apparatuses, such as cordless phones and cellular phones, faces challenges in ensuring clear voice output due to the positional deviation between the receiver and the earhole when the device is held against the ear, leading to reduced sound quality and the need for increased pressure to compensate.
Innovation Solution
Incorporating a secondary tone hole positioned below the primary tone hole, allowing sound to reach the earlobe even when the primary tone hole is blocked by the earlobe, ensuring consistent voice output regardless of the device's position relative to the ear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the receiver is arranged closer to the upper end of the main body to reduce the gap among components, then the size of the main body is reduced, but the receiver becomes positioned at a location higher than the earhole when held to the ear, causing positional deviation and degraded sound quality
Solution Approach 1:
The patent divides the sound transmission function into two separate tone holes (first tone hole and second tone hole) instead of using a single receiver opening. This segmentation allows each tone hole to serve a specific purpose: the first tone hole for primary sound output and the second tone hole for compensating when the first is blocked, thereby resolving the positional deviation issue while maintaining compact size.
Solution Approach 2:
The patent changes the spatial parameters by adding a second tone hole at a different position (lower part of the front surface) with different dimensions compared to the first tone hole. This parameter change enables the system to maintain effective sound transmission across different holding positions by providing alternative sound paths.
2Manufacturing precision
If the user presses the main body strongly against the ear to compensate for positional deviation, then sound quality may improve, but the tone hole closely contacts with the earlobe making it difficult to listen to clear voice
Solution Approach 1:
By segmenting the sound output into two separately positioned tone holes, the patent ensures that when one tone hole contacts the earlobe during strong pressing, the other tone hole remains open and functional. This eliminates the need for users to worry about blocking the sound path, making the device easier and more comfortable to operate.
Solution Approach 2:
The second tone hole acts as a pre-prepared backup solution that compensates for the potential harm of the first tone hole being blocked. This beforehand cushioning ensures continuous sound transmission regardless of how the user holds the device, preventing the harmful effect of blocked sound path.
3Device complexity
If a single tone hole is used for sound output, then the device structure remains simple, but the sound cannot reach the earlobe when the tone hole is blocked by the earlobe
Solution Approach 1:
The patent applies segmentation by creating two tone holes instead of one, providing redundant sound paths. This maintains relatively simple structure while significantly improving reliability, as the system can tolerate blocking of one tone hole without losing sound transmission capability.
Solution Approach 2:
By changing the number of tone holes from one to two and positioning them at different locations with different dimensions, the patent improves sound transmission reliability without excessively increasing device complexity. The second tone hole provides a backup path that activates when the first is blocked.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances sound quality by maintaining clear voice output over a wider range without requiring additional components or increasing the device's size, thus maintaining portability and reducing manufacturing costs.
Implementation Method 1
a speaker 82, which outputs a sound; a first tone hole 85, which is provided in front of the speaker 82 to emit the sound output from the speaker 82 to the outside
Data Source
AI summary
Telephone apparatus in that a front cover 3 and a rear cover 4 are combined with each other to form a main body 2, and various components are provided in the main body 2. The front cover 3 includes a transmitter 5, an operating unit 6, a display unit 7, and a receiver 8 from the bottom of the main body 2. In the front cover 3, a main tone hole 85 is provided in the vicinity of a speaker 82, and a sub-tone hole 86 is provided below the speaker 82.