Secondhand Maico MA 53 Audiometer Device

Objective AI Report

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Report date: 17.12.2025

MAICO MA 53 Audiometer and Philips SHP1900 Headphones Analysis Report

Device Identification

Two main products are observed in the examined images. The main device is a desktop-type medical diagnostic device used in hearing tests (audiometry). The second product is a circumaural type of headphone located next to this device. The products should be considered as part of an audiometry device set or a hearing test station.

Brand and Model Information

As a result of detailed visual inspections, the brand and model information has been determined with 100% certainty:

• Audiometer Device: Based on the plastic embossed logo in the lower right corner of the device and the inscriptions on the reference card located on its top cover, the brand has been identified as MAICO and the model as MA 53.
• Headphones: As a result of the writings on the side surface of the headphones, the brand has been determined as PHILIPS and the model as SHP1900.

Areas of Use

The MAICO MA 53 is used in audiology clinics, ear, nose, and throat (ENT) departments of hospitals, or hearing centers to diagnose hearing loss. It is a device capable of performing air conduction (AC), bone conduction (BC), and speech audiometry tests. The Philips headphones are an accessory used for sound transmission; in this context, it is understood that they are used for transmitting test sounds to the patient or for operator monitoring.

Originality and General Condition

The device’s outer casing, button structure, and markings reflect a professional manufacturing quality compliant with medical device standards. The Philips headphones also feature the brand’s original design characteristics. From their general appearance, it is understood that they are in “second-hand” and “used” condition.

Physical Deformation and Cosmetic Condition

The physical condition of the products has been analyzed as follows based on visual data:

• Audiometer Casing: No noticeable deep cracks or breaks have been detected on the device’s grey/beige plastic casing. However, slight yellowing or discoloration due to time on the plastic surface is normal.
• Information Card (Sticker): The information label titled “Second-Level – Functions MA53” located on the inside of the device’s foldable lid is worn, stained in places, and aged. However, the diagrams on it are still readable.
• Keypad and Buttons: Most of the writings on the black buttons on the front panel have been preserved without fading. No excessive deformation is observed on the rubber/knurled surfaces of the adjustment wheels on the sides.
• Headphones: The ear pads (cushions) of the Philips headphones are fabric-covered and maintain their integrity; no tears have been observed. The headband plastic appears robust.

Mechanical and Electronic Components

Data obtained from the visuals indicate the following regarding the mechanical and electronic condition:

• Screen: An LCD screen is located in the center of the device. Since the device is turned off, it cannot be determined whether there are dead pixels or display errors on the screen, but no breaks or deep scratches are visible on the screen glass.
• Control Units: The large decibel (dB) and frequency (Hz) adjustment wheels located on the right and left sides are in place. Function buttons such as “TALK OVER”, “STIM”, “STORE” appear complete.
• Mechanical Lid: The hinged lid mechanism on the upper part of the device appears robust and can remain in the open position.

Accessories and Connections

Accessories observed within the analyzed set:

• 1 unit of Philips SHP1900 Headphones (Black color, wired).

Other potential accessories such as the device’s power cable or patient response button are not visible in the images. No socket inputs are visible on the front panel of the audiometer, and it is presumed that the inputs are likely located on the rear panel.

Label and Control Panel Information

Important technical terms and label information located on the device’s panel and lid are as follows:

• Second – Level – Functions MA53: This is the reference label inside the lid. It describes the device’s second-level functions such as “Dual Frequency”, “Pulse”, “User-Menu”, and “Mixing”.
• Panel Buttons:
  • AC (Air Conduction)
  • BC (Bone Conduction)
  • MIC (Microphone)
  • TAPE/CD (External audio input)
  • NOISE (Noise/Masking)
  • PULSE (Intermittent sound)
  • STIM (Stimulus – Stimulus delivery button)

Potential Malfunction Risk

In the visual analysis, no signs of severe damage such as breaks, burn marks, liquid contact, or corrosion that would directly affect the device’s functionality have been found. However, the wear on the lid label suggests that the device has been used intensively. In electronic medical devices, long-term use can lead to maintenance-requiring conditions such as loss of sensitivity or dust accumulation in potentiometers (adjustment knobs). The device, in terms of its general condition, appears to be a well-maintained and clean second-hand product.

Quantity Information

A total of 2 product units are present in the images (1 MAICO MA 53 Audiometer and 1 Philips SHP1900 Headphones).